Stop trying your hand at everything
This ties in to setting your priorities straight and focusing on 0ne goal at a time. When you divide your attention, energy and focus into too many parts, you fail to hone your expertise and skills where they could flourish the most.
If you want to execute your strategy successfully, you need to know your strengths. You need to know what you are good at, passionate about and most driven to do. Investing in the wrong goal will only stop you mid-way without ever being able to bridge the execution gap.
Think of examples of highly successful individuals who excel at what they do. Take your pick from your favorite athlete, celebrity, scientist, inventor or just about any other category and you will see that these people succeeded because they focused on their strengths and mastered their crafts.