Invest $25 in the video "Masters of the Barebow, Volume III". Even better, if you can, get to a Rod Jenkins clinic. Either one can take years off the learning curve and save you loads of money in lost/broken arrows, wrong spines, wrong bows, and frustration. No magic elixirs, just proven and easy to follow instruction. If you do the drills, it will work.
In the video the push they also mentioned this series I wonder if it would be worthwhile to pick up the whole set or are you just recommending the third primarily?