Sadly, I think the only "trick" is more and more practice. I'm not a "math guy," either. I stopped taking math in high school with pre-calc, and that was the last time I looked at a math problem until now.
The good thing about the GMAT is that there's very little they actually do test you on. It's number properties/theory, basic geometry and algebra, and it touches on statistics, too (something I never even saw while in high school).
The only thing they end up doing is rephrasing concepts and questions a hundred different ways, but usually you see a clue in the question or the answer that will give you an idea of what to do. I started studying last July. I went at math hard for a month, and could still barely answer a 500-600 level questions. I stopped because work got hectic at the beginning of August, and didn't think about it again until this December. I still could barely do a 500-600 level question, but I think the concepts somehow marinated over the course of a few months, and as I learned them this second time, I started to not only 'get' them, but more importantly I started seeing the same ideas come up again and again, and so I started to recognize problem types and therefore problem strategies.
Just as an example, if you saw x^2 -5x + 6.... in a problem, you should recognize that it's a quadratic and that the GMAT is most likely trying to disguise the fact that you need to factor it into (x-2)(x+3), either for a solution or in order to cancel out some other phrase in the problem....
I find that recognizing the type of problem is just as important as knowing the math, so see what happens if you just start doing problems for the sake of asking 'what kind of problem is this'? quadratic? Number properties? A word problem with fractions or percentages? And once you recognize that, ask yourself, well what are the tools you need for this sort of problem?
Hope that helps at all! I think those of us who are math-deficient are in the minority on this forum, but I really think it's just about trying to think about the problems a hundred different ways until you find a way that clicks.
Good luck!