Ive read alot about the species i target and generally what they do seasonally and how different weather effects fish. Then fish hard for a year applying the knowledge and learning/trusting your electronics. Make notes of the day of the year, enviromental conditions, and locations. Thats why i include this information in my videos. Revisit those spots when the time is right. I would hit a variety of locations with dry holes until i figured out the patterns for crappie.