I think what you need to do is start doing the Kundalini Yoga every day. Or maybe not every day, but often. The Basic Spinal Energy Series here.
http://www.pinklotus.org/-%20KY%20Kriya%20Basic%20Spinal%20Energy%20Series%20fp.htm
This will help you to get the flow of energy through your body to become stronger. And this flowing energy will help you with the other things you want to accomplish.
Also make sure all of your chakras are open so you don't get blocked.