Some great advice already in this thread - take it all!
I'm at the point now, after around 10 months, where I expect a minimum of one sale per day, but most days it's two and over.
I try and build & submit every day but sometimes it's difficult to maintain that level, especially when trying to keep freesites looking fresh & different.
I currently have over 200 and I submit to around 72 Link Lists with a "normal" niche like mature, or less if it's something more extreme.
I'm having some nice success with occasional galleries at the moment which makes my figures look nice.
I also have a few domains for webcam promotion, which I link to now and then when building freesites.
I'm also keeping track of where those precious sales come from. A recent freesite made three sales from the main page and two from the index page during the first few days of it being listed, so there are a few tips to be found if you look for them.
Gotta keep on building those sites and reading GG&J.
As others have already said you seem to have a good attitude - it will be tested though!