It's different depending on what you want to do but generally for me if I want to just fly straight off a kicker I carve until my speed is comfortable, approach slightly on my toe edge and once I'm at the kicker I flatten the board and pop an ollie.
Don't go too fast - It's better to roll over the top first time than get tons of air and fall. From a beginner's point of view it's important to keep your shoulders completely square and lead with your front arm otherwise you'll go into a 180 and land on your ass. Also popping the board at the top of the jump makes me feel more in control and because I've initiated the jump movement it means my body is prepared for flight so I have more time to think about the landing.
Oh and stay loose. It tends to lower the risk of the flail reaction.