Try to get your conversions at least somewhere around 1 sale per 30k unique gallery visitors, maybe ~1:15-20k with trials, thats a normal-good conversion rate these days.
And it's right that partner accounts don't harm, but everybody who is a successfull gallery submitter these days has started small some time ago. If you just sit around and do nothing you'll not get any partner accounts/connections to increase your traffic, the only way to get that is to keep submitting and improve your Database/Galleries/etc.
Take a look at
http://www.adultsponsortest.com/advancedsubmitter.htm for a big TGP Database you could use as a starting point, just submit to the entire Database for ~2-3 months and then take a look at your stats and stop submitting to those TGPs that didn't sent you any traffic.