Don’t sweat the small stuff
Definition 1 of 1
Pro Tip 1/3Emotional Nuance
Conveys a message of relaxation and not letting small issues cause stress or anxiety. 
You misspelled one word in your email; don't sweat the small stuff.
Pro Tip 2/3Colloquial Use
Common in casual conversation, less appropriate in formal or serious contexts. 
You're five minutes late to the hangout – don't sweat the small stuff.
Pro Tip 3/3Perspective Encouragement
Encourages looking at the bigger picture rather than getting hung up on trivial details. 
The picnic isn't ruined just because it's cloudy. Don't sweat the small stuff.