Late to a party is considered unacceptable as well as on the job. You can not force colleagues and bosses await you. It's just not right, and leaves a negative impact on your image. Let this small thing, but such little things add up image of irresponsible person, it is unlikely you is at hand. Leave the party before the chief also considered bad manners.
As the saying goes, all good in moderation. Of course, corporate parties, there is a chance to meet with the leaders or tie the necessary acquaintances, and for this purpose they are intended. But we must remember that talking too long with one person, you can tire him and at the same time deprive the attention of other colleagues. Since you work in a team, try to relate exactly to all its members, regardless of rank and position. As for making alcoholic drinks on a night out, there is also an important measure. New year - a big celebration, and the refusal to drink a glass of champagne with his colleagues could be interpreted wrong, someone will think that you do not want to have a drink with him. On the other hand, drinking too much, you risk being branded as an unreliable person, so it is necessary to control myself.
On holiday to dress nicely, but do not fundamentally change the image. You should prepare by buying a beautiful dress, in which you'll be confident. Monitor your behavior should not be ashamed, but it is not necessary to make a row. The consequences were not long in coming. Your good mood, cheerful disposition, a smile, a nice view and good will do their work on a corporate party, adding a few points to offset your future career.