TheStaircase Step #2 introduces Micro into your gameplay. The video (below) shows many scenarios, where you can use Micro and Multitasking. One of the most simple examples is 12Pool or Proxy-Hatch in in a Ladder-Game. Zanster played Early-Pool into ProxyHatch in Masters without Gas.

Playing one of those strats will improve your Micro a great deal.

http://wiki.teamliquid.net/starcraft2/Micro

The next important part is "Play agressive!"

TheStaircase Guide

Quote: "Play aggressively; avoid static defenses. [NeoBlade: 1-2 Cannons is ok, if you have to defend Drop-Play, DTs and so on]"

When you play aggressive your Multitasking will improve and you will be able to scout the front more often.

Zanster(Z) vs RuFF(T) - no gas

http://wiki.teamliquid.net/starcraft2/Zanster

http://wiki.teamliquid.net/starcraft2/RuFF
... reached GM 22-times.