I'm a big fan of the finger push-off and the finger crawl. Sometimes when you're in a tight spot, you can't move your feet without stirring up all kinds of crap. If your fins start to scrape or get too close to something, just find something hard and non-mobile to use to push/pull/pivot yourself out of the way. It's also a nicer thing to do when the object in question that is interfering with your fins is other divers, that just think the logos on my fins are the coolest thing since Page and Plant...
Tom
Tom