was just messing around with my probes early game when I discovered a trick that allows you to gain about a 7% mining rate with your workers. This can cut several seconds off your build. It requires alot of APM to fully utilize and is only really useful early game, which fortunately is when you have actions to spare. Personally, I find it very difficult to use this trick close to optimally, but even poor usage can save at least a second. I refer to this trick as mineral boosting.
all credit goes to sockfolde for the awesome find