Trout like seams because the current is not very strong yet they are close to where food will pass by allowing them to eat and conserve energy – two things trout worry about.
If you are having a hard time picking out the seams you might try a little trick that my kids taught me and drop a leaf upstream of a stretch of water you plan to fish and just watch where it goes. The leaf will eventually gravitate toward the seams and natural feed lanes in a stream just like the bugs do.