I use most of the ones that have already been listed. The only other one I use fairly regularly is the carrick bend. Good for joining two lines of different sizes together.
I make my trucker's hitch differently than what has been described here. I'll see if I can find an illustration of how I tie it. Nothing ever jams (there is no loop that jams)and it's extremely quick and easy to tie. I've used it thousands of times for tying down beehives on a truck.
This is how I tie the truckers hitch that can never jam, most of the time I don't even use the second hitch he puts in on top.
You can get even more tension by forming a loop in the live end and using your foot and jumping on it (like a stirrup).