A few things that occured to me while I was grinding some SFCs out, Dave Cole probably told you but I'm going to repeat it for people that may be reading and don't have the benefit of a teacher:
Firstly remember when practicing that practice doesn't make perfect, practice makes better. When practicing with mild steel or paint stirrers it's easy to get into a "it doesn't matter, toss it away" attitude. You won't improve like that, after a few for practice, start treating that paint stirrer as some high dollar damascus, if you make a mistake correct the mistake. Don't practice with the attitude of it doesn't matter, it does.
Lock your elbows in to your sides, this makes YOU a more stable platform to work the steel.
Don't use your arms to move the piece side to side, sway your body with your arms locked to your sides. Yes you will look goofy but it works better that way. Don't try to cop a feel while dancing with your grinder
Grind with your weak hand first, it'll be easier for your strong hand to match the weak side grind rather than the other way around. Try to use your weak side as much as possible to train it. I do most of my profiling with my weak side.
I usually rough in the plunge with a coarse belt then "back" into it with a fine belt.
Steel is usually the cheapest thing in your shop (USUALLY!!!!) sometimes you just gotta know when to toss a blade into a bucket and walk away or fling it out into the yard.
Belts are the second cheapest thing in your shop. You'll find that you'll make most of your mistakes when trying to force a dull belt for just one more blade.
Well that's all I could think of, hope it helps someone.