bigtitsparadise

I've been running my blog for a few years now, just as a hobby really, and I have never got any sort of decent traffic. As it's more of a hobby than anything I don't mind this two much but I'd like to make sure I'm at least doing the right things when I do post. So, here's some details about my site - should/could it be doing better?

Site: Apparently I can't post URLs yet, but if you need any more details about the site, just ask.
No. of posts: about 500 (I had around 2,000 but a lot of these were low quality so I removed them for now)
Average post length: 300 words (and with 1-6 images)
Post frequency: 2 per week
Backlinks: I don't really have any so <5 (I'm guessing this is a big problem)
Promotion: Have around 2,000 twitter followers and I share links there

No. of unique hits: 50-100 per day

So, what do you think? Could I be doing better and is there anything I obviously need to get onto? I'd appreciate any advice - I'm not looking to be a major money-spinner or anything (I guess tube sites are the way to go), I'm quite happy with my little site but I'm wondering if I could improve its discoverability without a massive overhaul.

What do you think? Appreciate guys.