I found this article while looking for party preparation for my sister’s birthday. It gave helpful guides to help me held a stress-free party. I’m sure you’ll find them useful as well. Here are the steps you should do, according to Vicki F. Chavis, the author.
1. Plan ahead for major tasks like shopping, cleaning, menu planning, decorating, getting dressed in an organized way. Consider unexpected occasions like bad weather and electricity turn-off.
2. The two days before. Make list of every item necessary for every recipe, do the shopping, prepare for decoration and serving dishes, and clean the house.
And the list continues up to one hour before the party… 
Read more here.