Don't try to overcome your weaknesses; that is the way of madness and frustration. But I'll give you a piece of advice: great strengths are great weaknesses and vice versa.
Therefore, rather than trying to be someone you're not, learn to harness your strengths and avoid your weaknesses.
Personally, I'm the same way. I'm a good project starter, but not a good finisher. Once I've gotten a project started, I'm ready to move on to something else. Guess what though? There are plenty of people out there who are great finishers, but can't start a project to save their life. Thus, they'd be my perfect partner.
That's what you have to do: harness your strengths, but realize that you're a human being. Rather than trying to be perfect, find someone whose skills complement yours. Then you'll be unstoppable.
Therefore, rather than trying to be someone you're not, learn to harness your strengths and avoid your weaknesses.
Personally, I'm the same way. I'm a good project starter, but not a good finisher. Once I've gotten a project started, I'm ready to move on to something else. Guess what though? There are plenty of people out there who are great finishers, but can't start a project to save their life. Thus, they'd be my perfect partner.
That's what you have to do: harness your strengths, but realize that you're a human being. Rather than trying to be perfect, find someone whose skills complement yours. Then you'll be unstoppable.