2. Adjustable Cawley Hitch - I love this hitch. It's easy to remember and does it's job nicely. I use this knot just about anytime I need an adjustable line anymore, and its very similar to a prusik loop. There is an outstanding discussion of this knot in the following link - the discussion of the hitch starts at 1:34 and ends around the 2:50 mark. Setting up a tarp with a ridgeline
3. Sheet bend on a quick release - My favorite way to join two ropes. I use this so often it's completely indispensable.
There you have it. Now, go out and rule the universe.