Give someone the green light

give permission to go ahead with a project.

Application: "Our boss gave us the green light to begin work on the new sales promotion."

Gain ground

go forward, make progress.

Application: "Our company has been gaining ground in our attempt to be the best in the industry."

Fill the bill

be just what is needed.

Application: "That new machine should fill the bill as to what we need to finish the job."

Bang for the buck

value for the money spent.

Application: "We were able to get a big bang for our buck when we advertised on the Internet."

In the market for

ready to buy something.

Application: "We have been in the market for a new computer for a long time but still we haven't bought one."

Sell like hotcakes

sell very quickly.

Application: "The children's toys were selling like hotcakes at the end of the year."

piece/slice of the action

a share in the activity or the profits of something.

Application: "The inventor wanted a large piece of the action of the profits from the new computer that he had invented."

Turn over

to buy and then sell something to customers.

Application: "The turn-over at that discount store is very rapid."

double-check

-check something again to confirm.

Application: "We were unable to double-check the costs of the new products before the price list was printed."