I add this a lot, but the book SM101, by Jay Wiseman, really helped me learn more about BDSM and, especially about safety. You don't say if you have a current partner or not, but whether with your now or with someone in the future, he gives worksheets for pre- and post-scene discussions that really cover all the bases.
You have probably already noticed that denuseri and leo9 are very helpful, among others. I have also gotten great advice//ideas from Scarlett (-something, I think 85), Ozme, and ksst. Look for names that are here a lot; that doesn't guarantee good advice, but almost everyone here seems eager to help.
Good luck, and enjoy!