I found "The Two-Hour Cocktail Party" on Hacker News, and the advice really resonated with me although I haven't had the opportunity to host yet. The author suggests doing a few of these cocktail parties before a dinner party, as he considers those to be advanced and quite stressful for someone not used to hosting. I have to agree, I read through it right after hosting a Thanksgiving dinner party that was a lot of fun, but was... trying.

https://news.ycombinator.com/item?id=32879851