functional groups

I understand that when it comes to Organic Chemistry, logic is key above all else. But that's not to say there needs to be some memorizing here and there. In the final weeks before I start organic chemistry, what would be some good things to just have in my brain ready to regurgitate? I know...

Anyone have a condensed list of functional groups that are crucial to memorize? I am familiar with most of them but I couldn't find an actual list of ones to drill into memory! Thank you!