Ladies, please do not cut your own fringe. You will become one of the many who go into the salon and expect your stylist to make them grow back.
But if you must. Some tips.
1. Cut your fringe dry. As others have already said, if your hair is cut wet, it will spring up when it's dry. The amount it jumps depends on your individual growth patterns/texture/porosity etc.
2. If you're doing a straight fringe, make sure to leave the length longer at the sides and shorter in the middle. It will seem like you're cutting an Arch. This is because your hairline/face shape is not completely straight or flat. If you cut a straight line, it will end up rounded at the sides, and longer in the middle.