I'm trying to learn how to hit the ball farther right now. Maybe I'll worry more about short game and putting a couple months from now......
1. Learn what big hitters do. Not necessarliy what they say/feel they do, and not what someone else is observing they do - look at what they actually do with their club and body (LM #'s and 3D data). Learn what they do and what of that you can adapt to your swing/body. But for the love of God, don't foolishly try to copy thier swings. No point in trying to get Ferrari parts unless you have a Ferrari engine.
2. Quit listening to short hitters who have no idea what they are talking about. Cannot stress this one enough.
3. You must improve your ballistics. If you are trying to go from not long to longer, you MUST know what aspects of you launch conditions are hurting you and how they should be changed. There is only one way to know this information - TM or FS.
4. Find someone who uses a TM or FS. Avoid people who do not believe in either. Avoid people who do not believe in their benefit or how to teach with them.
5. Once you find a TM or FS, get your equipment optimized for hitting it longer. There are numerous sources for bad information on equipment. If someone believes that a 90mph swing can cause a driver to go dead - run. If someone believes a driver needs to be replaced every year because of COR loss - run. Find someone who knows what they are talking about and has experience in fitting players into the proper equipment.
There are more, but if you do just these five, I guarantee you will be hitting the ball longer than you thought you could.