I prefer the improved cinch knot when fishing for smaller varieties of fish or when I'm in a hurry.

For the larger models I would recommend the san diego knot. The san diego knot is the best knot in my oppinion but does require a bit more time and effort to get right.

For line to line connections I use a blood knot primarily but at times use a double surgens knot.

Here are a couple links to fishing knot sites:

http://www.fish4fun.com/knots.htm
http://www.ao.net/~nautbob/fishknot.html
http://www.marinews.com/fishing/fk_main.htm

Dave(Outrage)