Backside

  You can do Backside crooked grind on pretty much any obstacle and they will be just as hard to land. Roll along side the obstacle and ollie up high and put pressure to your nose. Get locked on and slide until you near the end. You don't need to add any spins to land it, so just slide off the obstacle, land, and roll away.

Frontside

  Some people think frontside crookeds are easier. To do a frontside crooked, go up to your obstacle and ollie high, spinning just a bit to land your front truck crookedly on the obstacle. Keep sliding until you near the end of the obstacle and you don't need to do anything to get out of it, just slide through and land flat.