Boat Launch fail:
Early in the year and first trip out. Backed the boat down the ramp watching for where the water reaches the 'magic spot' on the wheel wells so the boat will come off nice and easy.
I kept watching and kept backing and nothing was changing. I'm thinking, "maybe the water levels lower than I thought" and "Maybe somebody dumped a load of rock and gravel onto the ramp preventing me from getting the boat and trailer in deep enough to launch.
Then I thought, "Maybe I ought to pull the trailer back out and take a look at the ramp" I did just that and noticed nothing was in the water and the water level was fine.
Then I turned toward the boat..... Oops! There's the problem! I'd forgotten to release the back straps on the trailer and it had just been hanging under the floating boat making it look like the water had been shallow. After a momentary feeling of "Dumber than Dirt" I went fishing and had a great "first day" of the season.