First, bird-proof your house. Leave cooking for another time, shut any fans, make sure the fireplace isn't working, be careful with any large mirrors or open or uncovered windows. Then do the following steps for about a week each or until your parakeet responds well. Put your hand in the cage until he's used to seeing it there. Next step is to place a finger close to his abdomen, perhaps offering him a favorite treat. Speak softly and don't make any sudden movements. If your parakeet seems fearful or runs away, be patient and start over. Eventually he will learn to trust you enough and sit on your hand.