All Missions
At the Press Start screen, press X, X, White, White, Y, Y, White, X, Y, Y, X, White.

Extra Money
At the Press Start screen, press Y, X, White, Y, X, White, X, X, Y, White, X, Y.

Farm Road 109: Shortcut:
When trying to use the shortcut across the railroad tracks, use the Jeep Liberty Sport. It can almost always get across before the train crosses if you approach from the right side of the tracks.

Crazy 2001: Treasure chest:
Go to the southwest corner of the lake near the start to find a treasure chest with money.

Restricted Area: Treasure chest:
Find the hanger with the UFO inside then go to one of the corners to find a treasure chest with money.

Using a winch:
After buying a winch for your truck, you can use it by holding Black then aiming into an anchor spot (for example, a rock or tree). Press A to winch it in, press B to get slack, and press Black to detach the line