July of last year I started becoming a dedicated gallery submitter. I try to submit 3 galleries a day, every day. Since last July, I have doubled my income, and it grows every month.
Granted, I have link lists, tgps, and a few blogs. But I make over 1/2 of my income from promoting my AVS sites, and about 2 sponsors, with galleries and free sites.
Like Shemp says, it is a lifestyle, and you have to be dedicated to doing it, and find niches you can convert.