The easiest way to practice taking a handoff is by going through the motions of a straight-ahead dive play. Line up about four yards off the line of scrimmage and charge straight ahead from a three-point or 2-point stance.
At the same time, have a quarterback move down the line, preparing to place the ball into your stomach area.
The pocket for the ball is first formed by the arm furthest from the quarterback. The forearm of this arm should be extended straight across the ball carrier's stomach with the palm up and fingers extended toward the quarterback.
This same ball handling technique can be used as you go to take a handoff from any position.