Mainly...dont try to go for grizzlies fast. I start off with 3 or 4 supply pads (depends whether you want a barracks for hooks and Spartanks). This gives you an insane amount of resources thanks to his Eco boost. Then i go for two reactors and a VD or Airpad. Once you've finished with your barracks recycle it for a HSP. You should have a full army of tanks/hornets by about 8 minutes.
Everything is overpowered!!!