I can only give you another two hours/days/weeks/minutes.
I need to have it by lunchtime.
I need it on my desk by this afternoon.
I have to have it no later than Friday at two P.M.
You have to have this done by tomorrow.
Let's get this done. Let's get this over with. Let's get this taken care of.
Let's take a break. It's break time. It's time for a break.
Let's take a coffee break.
I need to get out and stretch my legs/rest my eyes/clear my head.
I need to get out of the office for a little while.
A: How about taking a break and talking about this over coffee.
B: Sounds good, we're not getting much done just staring at the computer.