Davednick, perhaps this will or will not make sense. If I had one piece of advice it would be not to just start doing problems arbitrarily, but to work with someone (or if your unable to do that, then research) to identify how to do “types” of problems. The key to success in the GMAT is identifying the formula/shortcut to successfully complete each type of problem. A perfect example would be a coin flip probability problem. If you approach the question, taking the time to calculate it from scratch, you will almost always miscalculate and will take far too long. The key is to knowing the “trick” to doing the problem. This is what is going to take you past a 700. Also, simulating testing conditions and taking an actual GMAT practice exam, full length, same amount of breaks, as similarly to test day, every 2 weeks or so. This will give you a benchmark for how you are progressing and what types of problems you still need to work on. It will also increase your confidence significantly which is a big piece of the puzzle.
Incorporate all three methods along with this strategy, and you will see great improvement.