Another good terminal knot for light tippets is the palomar, which eats up a little tippet to tie but provides exceptional strength which comes in handy for light tippets when you are fortunate enough to hook a good fish.
I second the double turle knot for steelhead / salmon fishing with a loop eye.
IFFF Certified THCI @ 2005
Capeflyfisher Guide Service
Island Hopper, Guitarist, Incurable Dreamer
and Founder, Worldwide Flyfishing Forum