Little things: good line, sharp hooks, depth, type of bottom, thermocline, water color, time of day, wind speed and direction, what a bite looks like and feels like and sometimes sounds like, bait speed or lack thereof, color, local forage, time of year, time of month, current or lack thereof, boat traffic or lack thereof, onandonandonandon. Guides process many factors to try and solve the equation. I do well, sometimes very well, but I will be blessed if I will take money to try to produce fish for others - especially when they add extra factors such as inappropriate equipment.