Well to me acceptance is a part of recognising that it's a PROBLEM, rather than a part of your life. It's the same with anything else, whether it's drug, or alcohol addictions ...maybe the death of someone close, etc. It shows you know what these flaws are and what steps you have to take in order to overcome it, rather than just ignoring them. I just think the problem for a lot of people is getting out there and taking those necassary steps.
I hate to say this but I honestly believe accepting yourself as a person with problems is a way of saying... "I can't change this, it's too hard, I have to accept that this is a part of my life and just get used to it." But I guess it depends on the severity of your situation, and whether you're willing to act.
That's just my opinion though, I hope you don't find what I say too critical. I was brought up in a very strict household, so i think improving myself and my aspects is essential.
But as already stated, accepting yourself and the way you think, your attributes and other things... Well that's really important. I don't think I know how you can do that if you're having trouble though. I might suggest focusing on more positive things about yourself, you'll grow, and may even be proud of yourself for that. It just takes time.