Hanukkah: This is the way.

On the 25th of Kislev (start) the eight days of Hanukkah, and they are prohibited for eulogizing and fasting, but are permitted for doing work. The women have made it a custom not to do work while the candles are burning. And there is [an opinion] that says that we may not be lenient for them.

The many meals which we add on [these days] are voluntary meals, since [the Sages] did not establish them as [days of] feasting and joy. Rem"a: But some say that there is somewhat of a mitzvah in adding meals, because during those days was the Dedication of the Altar (Abraham Kara of Prague). It is the custom to recite hymns and songs of praise during the feasts added on them, and then they are mitzvah meals (Book of Customs). Some say that cheese should be eaten during Hanukkah, because a miracle was done though milk which Yehudit fed the enemy. (Kol Bo and Nissim of Gerona).

One needs to be very diligent in kindling the Hanukkah lights. Even a poor man living off charity must lend or sell his clothes, and buy oil to kindle with.

How many lights should one kindle? On the first night, he kindles one [light]. From then on he continues to add one each night, until on the last night they are eight. And even if the household members are many, they should not kindle more. Rem"a: And some say that every one of the household members kindles (Maimonides) and such is the widespread custom. And they should take care to each place their lights in a unique place, so that it will be apparent how many lights they are kindling. (Abraham Kara of Prague)

One should place the Hanukkah light at the entrance which adjoins the public domain, on the outside. If the house opens to the public domain, he should place it at its entrance. If there is a courtyard in front of the house, he should place it at the entrance of the courtyard. If he lives in the upper floor, having no entrance leading to the public domain, he should place it at a window that adjoins the public domain. In a time of danger, when one is not allowed to perform mitzvot, it is enough that he place it on his table. He needs another light to use for its illumination. And if there is a bonfire, he needs no other light. But if he is a dignified person, whose way is not to use the illumination of a bonfire, he needs another light.

It is a mitzvah to place [the Hanukkah light] in the handsbreadth closest to the entrance on the left, so as to have the mezuzah on the right and the Hanukkah light on the left. But if there is no mezuzah in the entrance, he should place [the Hanukkah light] on the right. If one places it in the doorway itself, he should place it on the leftmost half of the entrance. Rem"a: However nowadays, when all kindle inside, and there is no distinction for the people of the public domain at all, one should not worry so much if we do not kindle it in the handsbreadth closest to the entrance. In any case, the custom is to kindle it in the handsbreadth closest to the entrance, as in [our ancestors'] days, and one should not deviate; unless the household members are many, [in which case] it is preferable for each one to kindle in a unique place rather than mixing the lights together, with no distinction of the number of lights they are kindling. In any case, they should take care not to kindle in the same place where they kindle lights all year, since then there would be no distinction at all. And even though there is only no distinction except for the members of the household, some distinction at least is necessary. In the synagogue, one should place [the Hanukkah light] at the southern wall (or to the south of the lamp, and he should arrange them from east to west). (Terumat Hadeshen Section 104, Beit Yosef) We kindle and recite the benedictions (in the synagogue) for the sake of publicizing the miracle. Rem"a: A person does not fulfill his obligation with the lights of the synagogue, and needs to kindle again in his own house. (Isaac ben Sheshet Section 111) We have the custom to kindle in the synagogue between the afternoon prayer and the evening prayer. Some have the custom to kindle on the Sabbath Eve before the afternoon prayer. (Kol Bo and Book of Abudirham) If [the prayer leader] wants to quickly pray right away after [he] has recited the benedictions and kindled one of them, the synagogue attendant may kindle the rest, and the prayer leader may pray. (Jacob ben Moses Moelin)

Chanukah candles are not lit before sunset, but rather with the end of sunset, neither later nor before. And there are those who say that if one is busy, it is permissible to light from Plag Hamincha and onward, as long one puts enough oil [so that the lamp will remain lit] until people stop passing through the marketplace.

If one did not light with sunset, either due to forgetfulness or on purpose, s/he should go ahead and light until people stop passing through the marketplace, which is approximately half an hour, because then the people are passing and coming home and thus the miracle is publicized. Therefore one must place enough oil for that time, and if one put more oil in, s/he may extinguish the candle after that time has passed, and may use the light after that time. [Re"ma: There are those who say that in this time, when people light indoors, there is no need to be careful to light before people stop passing through the marketplace (these are his own words, and the words of the Tur, quoting Tosafot), and regardless, it is good to be careful even now.] And this is the ideal case. But it this time has passed and s/he has not lit, go ahead an light all night, and if the entire night has passed and s/he has not lit, there is no making up for it later. [Re"ma: And on other nights, one should light like all other people, even though s/he did not light at first. (He found this written in the name of the Maha"ril and also shared it as his own opinion.)]

Whoever didn't light, and isn't going to be lighting that night, and also their household didn't light on their behalf, when they see a chanukah candle they should make the single blessing of "sh'asah nissim (who made miracles)" and if it's on the first night, they should also say the blessing of "shehechiyanu (for sustaining us)" and if on the second or third night they can light themselves, they do not repeat the blessing of "shehchiyanu (for sustaining us)"

Someone who cannot afford both Chanukah candles and Shabbat candles should buy a Shabbat candle, for the sake of tranquility in his household (see above Siman 263:3); and if he has money for a Shabbat candle, but not enough for a Chanukah candle and kiddush wine, he should be a Chanukah candle, to publicize the miracle. Rem"a: And such is the ruling, that a Chanukah candle takes preference over wine for Havdala, and see above Siman 296:5).

Before Shabbat begins one should first light for Chanukah and then for Shabbat.