What do you do to relax at work when things get heavier and life feels more stressful?

I kinda need ideas 'cus I'm tired and I tend to get grumpy and mad. :(

When Friday feels a lot like Monday, you know you had a long day at work.

The client asked me today to include Internet Explorer to the compatibility list. After 5 minutes of continuous refreshing, Internet Explorer finally shows me in developer tools that it does not support Promises and Object.assign().

At that moment, my Promise to the client also failed.

Got a middle software developer position at a great company.... wrote 10 lines of code and spent 90% of the time in calls and meetings.

*me currently working with .NET and Angular2*
Manager: you have to switch projects, you will work now with Node.js and React only
me: I don't want that.
Manager: okay then.

*two weeks later*
Manager: I'm sorry, you have to switch projects.
me: ...

And here I am onboarding to a new project, trying to understand how React and Node.js work.

P.S. help me get my avatar.