Some suggestions
Modified)
1. find good/popular boards to post on
>Most of Good/popular boards don't accepted new poster even if you contact admin stuff, they don't replied. so, I am not accepted this idea.
2. start your own blog, but it helps if you already have a following on the boards so you can drive traffic to your website
>Good Idea, but take more time to get some traffic that brings your satisfied sales, I agreed with 50 percent of this point.
3. Focus on a particular subject/niche. Be the only guy out there posting videos of toe-sucking aliens from Uranus and fans of that genre will beat a path to your door 
>>>100% true.
4. Don't be me-too poster. If you're the 12th guy to post the same thing you're not going to get the hits, let alone the sales
>>>100% true, stop posting where spammer posted, but it very hard to find boards where duplicates not allowed!
5. Make your posts easy to read, but with plenty of detail about the content. If it's video post high-quality previews and codec-specs, etc. A tiny little thumbnail with no details ain't going to cut it.
>>>100% true.
6. Watch the best posters in your area and ask yourself why they're the best, why they're popular, what do you like most about their posts?
>>>100% True, Nice Idea, (Edited cause I Don't read properly question).
7. Post stuff people can't find anywhere else (i.e.: those toe-sucking Uranians) you'll never be able to compete with the guys posting the latest/newest stuff
>>>100% true.
8. Think CLASSIC - there's plenty of stuff from 3,4, 5 or 10 years ago that is hard to find.
-When I get 20-30 dl from other hosts ..and 0 from RG for the same files..
-When stats are frozen for hours..not even 1 dwonload conunted..
