Giving your all and being productive at work are awesome ways to get ahead professionally. But some rest and relaxation is essential, too, and forgetting about it can lead to exhaustion, fatigue, and unwarranted bitterness. (Looking at photos of other people at the beach while you’re stuck at the office? So not cool.)

So, this summer, don’t forget that it’s okay to use those vacation days—in fact, a little time off can help improve your efficiency and happiness in the office. The infographic below shows the most crucial signs that it’s time to shut down and sign off—plus gives some suggestions for where to book your next trip. Have fun!

Infographic courtesy of Visual.ly. Photo of going on vacation courtesy of Shutterstock.