If you're not reading Fossil9's blog, you're doing yourself a serious disservice. There's tons of good advice, like
If you want to do bondage, make certain you know your Dom well. When you are bound up and immobile (The best kind, to me), a Dom can do anything and you can’t stop them. If this doesn’t set off all sort of alarm bells, go jerk off a few times and then come back when you have a level head.
Definitely worth a read, no matter what your skill level is.