Learn the art of blocking, dodging, and weaving your way through the world. From the classic "I'm not here, you'll just have to wait" to the advanced "I've got a meeting that's been moved to 3 PM, sorry", we've got it all covered.
Remember, the key to successful obstruction is to always keep your opponent guessing. Unless they're really, really smart, in which case, just pretend you're not there.