How do i choose flies? If it is the same as choosing a lure for bass then i will have a pretty good idea, but a few pointers would be greatly appreciated (or even pictures or links to pictures would be awesome)
1.) Consult a "hatch chart" for the area you will be in. It will give you a good idea of what kind of insects are there.
2.) Read fishing reports from message boards such as this.
3.) Stop into a local fly shop.
4.) Take your time and really look around when you are on the water.
See if anything is hatching out of the water or flying around.
Look for mayflies flying around and landing on stuff
Look at the grass and see if there are grasshoppers
Flip over rocks in the stream and see if any nymphs are stuck to the bottom of the rock
Look in the water for any baitfish or crawfish
Ask other fishermen what they are using
Mainly, just OBSERVE what is going on around you. Take your time and be quiet, gentle, and patient.