It depends on what kind of trout your fishing as well as native or stocked.. A little more info and you may get a little more help on this one. Also depends on time ofyear as well as stream ,river, or lake..
As some has stated red fin shiners work good as well as worms for most times of the year. I have friends that have caught alot of them just using a kernel of corn right out of a can.. So give us a little more info.. Also brook, brown, rainbow, ect...