Rule #3

If something's worth doing, it's worth doing now.

The corollary is that if there's something that sounds like it'd be fun to do, but you don't want to do it right now, then the chances are that you actually just don't want to do it. This particularly applies to sexual encounters. ("Yes, it'd be fun to go to [ ] and play with [ ], but not this evening, I think I'd rather stay in watch television". Which means that there's never going to be a right time to go [ ] and play with [ ].)