I've obs'ed many games and helped
several players achieve a higher level of gaming. The one thing that I've
noticed most is not enough guys mining. The best way to keep a constant
mineral flow is to hotkey your buildings and keep pumping those miners nonstop.
That means in your main and your expansions (lots of players stop pumping probes
in their main base once they've expanded and leave all the pumping to their expansion).
I also dont recommend having all your guys mining only 1 source of minerals.
This will leave you open for a mineral attack that could set you back
tremendously. Once you see that your minerals are getting crowded, or running
out, you know its time to expand. Try out this economy strat, it will seem
awkward at first if you've never used hotkeys but once you get used to it,
you will be able to pump non-stop in every base. -MaD)Hatter