Well, it’s 2018 and it’s time to get back to work. And the best way to do this is to write down, everything that you have to do. Don’t worry about what order it is in, just write it down.
The first day back at work can be extremely overwhelming. You have probably received hundreds of emails while you were on leave. Open all of them, and browse through them, but don’t get distracted. Just be aware of everything that needs get done.