Before we get to the good stuff, though, a few safety tips are in order.
* Talk about what's going on with your partner. You don't necessarily have to tell him or her exactly what you're planning; in fact, sometimes surprises are fun. But you don't want to do anything your partner hates, either. This isn't just for one person's benefit.
* Establish a "safeword." What's that? It's a code word that the submissive can use to mean "stop. Really. I mean it." You don't want to use a word like "no" or "stop," because sometimes you might want to work a pretend struggle into your fantasy. (I like "aardvark.") If your scene involves gagging your partner, establish another way that that person can say "Enough"--one common solution is for the gagged partner to hold a bell or some other object, and drop it if things get to be too much.
* Keep a few things handy. You want to tie somebody up? Cool, but have some scissors on hand in case you need to get 'em loose in a hurry. A pair of bandage scissors, which have one pointed blade and one blunt blade, can be slipped beneath a rope without risk of cutting the skin, and is especially handy. And for God's sake, make sure you have a key before you try on those handcuffs!
* Pay attention! Use common sense. Don't rush full-tilt into things you haven't tried yet. Take it slow.
With that in mind, let's get to the things you can really do. (Some of the scenarios are written from the point of view of a male dominant and a female submissive, but they'll work any way you want to try them.)