Check out the Joe Miller Knot.
Way better than the std clinch knot. Very easy to tie, cinches down into a tight compact knot, and VERY strong.
Put it up against my favorite twice-around-the-eye San Diego Jam by tying each end of a length of line on to separate snaps. Ran the test 5 times. Had to pull VERY hard to snap the line each time! Joe Miller broke once, TATE San Diego Jam broke once, and the un-knotted line in between broke three times!
Check out the tying video.