basically, to be ready to go to work as soon as you get somewhere, or ready to tackle a problem as soon as you are faced with it.

Get going “RIGHT OUT OF THE CHUTE”

Make changes “ON THE FLY”

Work hard at it “FROM THE GET-GO” or “FROM THE WORD ‘GO'”

GET AFTER IT

Hope this helps.

to immediately work very hard and successfully at a new activity

http://idioms.thefreedictionary.com/hit+the+ground+running

“Seize an opportunity; begin at full speed. For example, As soon as the front office gave its approval for the new department, we hit the ground running. The origin of this term is disputed. It may come from troops dropped into a combat zone, from stowaways jumping off a freight train as it nears the station, or from Pony Express riders avoiding delay when they changed mounts. “

http://www.answers.com/topic/hit-the-ground-running

lol just a guess