Rainbows are also relatively easy to catch, as they will eat almost anything. Bait works well. Rainbows find worms irresistible. Minnows are also a good choice, as well as, corn, cheese and macroinvertebrates. Figure out what works best for you.
Lures are great.
Spinners, spoons and plugs all work. Pick your favorite. Since flies are bows favorite, check the hatches and you will do well. The best advice for catching these beauties is learn the water. Learn what constitutes good cover and feeding areas.