Learn the bomb jump advanced combo.
Bombs make you bounce when you explode. Unlike previous titles, Samus can immediately jump in Morph Ball form without an upgrade. However, you can still use the bomb's bounce technique with Morph Ball Jump. Jump in Morph Ball form and place a bomb at the highest point. Then jump again to get hit by the bomb. Just as you get hit, put a bomb in its place and repeat the process.