I think that what you look for depends alot on what time of year you're fishing and what type of lake you're fishing. This time of year, on a timbered reservoir, I'd look for the edges of timbered main lake flats not too far from the creek channel, or other deep water. Also, watch for bends in the creek channel in deeper coves and maybe on the main lake. Just depends. As the water warms up - they'll move back into the coves, usually along the creek channel or other migration route with dropoffs and cover. Go into a cove and look for gravelly banks with cover and sheltered rolls in the bank that look like good spawning habitat. Cover and black silt helps - find laydowns. Then back off to the first breakline that Jiggin 15 was talking about. Don't ignore any good cedar trees within 50 yards of a good spawning site. Anyway, that's my 2 cents worth on the next couple of months. Finally, it all looks different on a map than it does when you get there. It pays to spend some time just looking around. Good luck.
Jim - Have boat - will travel.