Also, at some gyms they have pullup machines that can put on some counter-weight until you can do the pullups. Another good pushup exercise is isometric pushups, where you hold yourself in the up position, count to 5, go down halfway, count to 10, go down to an inch off the ground, count to 15, go back up to halfway ONLY, 10, all the way up, 5. They give alot of work for a small amount of time.