In my experience a couple of really good freelance gigs can be enough to cause all of these problems. The problem is there aren't enough hours in the day and s

In my experience a couple of really good freelance gigs can be enough to cause all of these problems. The problem is there aren't enough hours in the day and so if a project starts getting behind you work at it harder, forego things like marketing yourself (because you can't commit anyway to anyone else) and pretty soon your presence is down. It's a painful lesson and I have been through it. When you combine this with a sluggish economy, what might have been a moderately painful lesson before can be quite devastating. I do, however, agree with the recommendation to talk to other freelancers, etc because this really helps with the learning curves of this sort.