I usually have someone 'beta' my lineart before I start colouring them. This way, if there's any extremely noticeable flaws, I can change them before it becomes more difficult.
Regrettably, I didn't have anyone look over the lineart of my latest picture and decided to have it beta'd when it was 99% complete.
Not the smartest move, as fixing it was a lot of work (opposed to just changing lines).
Here's the drawing at the moment:
I know there are still flaws in the anatomy, but right now I don't have the zeal to fix them. Of course I'll try to fix it up before it's 'done' and posted officially online :)
PS: I'm disliking Photobucket's new system where it asks for tags on pictures after uploading them. >:c