My suggestion is that you stick to this forum and try and read the approach people take to solving them. When I started studying for the GMAT I was very weak.
However I stuck to the forum and I know for sure that it has helped me raise my score to the high 40s.
I think the trick is to be able to understand the best and fastest approach.
So you can do the following:
1) Visit the forum everyday and attempt as many questions as you can even if you get them wrong.
2) re-visit those questions and look for explanations. I look for certain members who are really good (HongHu (God of Math), ywilfred, professor, giddi..etc.)
3) If you get a question wrong in your practice tests or materials or if you get a answer right by luck, post it on the forum to understand the underlying concept.
Good Luck. Hang in there.