I've been an AD for ten years and have learned that the web is your friend. I love planning themed weeks throughout the year and they are usually based on the interests on the residents. For example, I had a Civil War Days week planned for my residents for the 150th civil war anniversary. I had trivia like, name the general, famous Lincoln quotes, etc. I invited a speaker to talk about how the civil war effected out local area in WNY.
Also, check out monthly special days throughout the month to get ideas. If it's dill pickle day, have a dill pickle social or do a pass the pickle game. Yes, some ideas flop but others turn out well and the residents have alot of fun. Be creative!