1.You have to make certain that you know where this party is.
2.You shold now something about your hosts for e.g what do they like.
3.You shouldn't be late because it is very impolitely from you and your host can take umbrage.
4.It will be nice from you if you take a little present for your host.
5.You should to put on a nice clothes.
6.You have to be kind for your host.
7.You ought to listen what does your hosts say to you because you are only a guest.
8.It will be nice from you to flatter your host.
9.You shouldn't eat and drink to much at the party because it is not suitable.
10.After party you can invite your host to your house.