relax and shop

Just chill out for now or don't worry about events over which you have no control. This comes from the advice given next to flights in departures, 'relax and shop' before a gate is confirmed. It describes what one should do in purgatory before events or decisions which could go either way, good or bad.

John: I'm really worried about those test results.

Marsha: Well, there's nothing you can do now, just relax and shop.