Technique, understand the fish
I have found that there is really no magic bait. I have unexpectedly caught bass and crappie on fish guts and rotting chicken liver (was expecting catfish). What really makes a difference is technique and timing, fish feed on cycles and can be triggered to strike both artificial and real bait. Anything flexible like a silicone strip or natural plant fiber "wacky rigged" so that it has maximum "action" and positioned just in front of where you expect the game fish to be can get it to strike. If you have masked your scent with insect/fish/animal oils the fish will not spit it out as fast giving you a second or more to set the hook. While fishing in clear water of the Frio River once I carefully wiggled a wacky rigged soft plastic stick bait in front of a black bass for almost 15 minutes before she struck it then spit it out in about 1.5 seconds. Very educational.
Rubber band on dry fly hook
A rubber band tied to a small hook (size 10 down to 24) can work almost as well as those rubber/silicone legs sold in fly shops. I especially like thin wire "dry fly" hooks for best action. Often use a brass swivel as weight instead of split shot which can weaken light tippet. Also if light may float up if tied about 12-18" from weight. Good for trout and sun fish etc but I have also caught bass, crappie, catfish and sucker fish with this rig.
favorite small fish bait if I'm hungry, not sport fishing
Berkley's Floating Trout worms wacky rigged on a dry fly hook are one of the easiest methods of catching trout, pan fish and small bass I have found. There are many variations to this method, weedless or not, with a weight or just floating on the surface, or sinking slowly by the weight of the hook etc etc. Weight added to line foot from the hook or wire run into the soft plastic, centered or one end. I prefer to place hook at weighted center of worm, keep weight 18" before or after hook, cast it at seam in stream where fast and slow water meet. But there are many other brands and natural alternatives to this bait, stem of leaf such as willow can work if you get the technique down, dried guts/skin from dead squirrel or fish. Here are some helpful links:
http://www.berkley-fishing.com/Power...efault,pd.html
http://www.bassfishingandcatching.co...m-fishing.html
As most experience fishermen will tell you, the bright colors generally work better in low light and stained/muddy waters but in very clear waters the more natural colors may be less likely to spook the fish or cause them to think it is just trash or plant blooms they normally do not eat. However, some caddis nymphs are bright colors like chartreuse so you never know. Best to lift some rocks and aquatic plants and find out what types of nymphs are living there. I once got stung by a aquatic bug that felt like a bumble bee, but the swelling went down after 2 hours, so no big deal. Then when you catch 1st fish, inspect its digestive system to see what it has been eating and adjust accordingly.
When sport fishing, I prefer caddis dry flies and a light fly rod, such as 3 weight. Or whatever the hatch is.
Major hatch is on, I will catch more with wet caddis fly than with plastic worm. If not plastic worm down deeper.