Find a hobby that will take you and your brain away from work
Examples include such active hobbies as sports, creativity, various puzzles and crosswords, but not watching TV.
Set goals in life the same way you do at work
This works directly in conjunction with the previous paragraph and this is the surest way to awaken interest in various non-working affairs and hobbies.
Plan meetings with other people
Most likely, it will be much easier for you to finish work knowing that you have a walk with friends or dinner with relatives planned.
Separate work and life
If you check your mail to see photos sent by friends, and at the same time you see work letters and assignments, then you are unlikely to be able to distract yourself. Perhaps you should still have different mailboxes, im accounts, etc.
Know in advance when to say "no"
Remember the 80/20 rule? Think about what things take you a lot of time, but practically do not bring any benefit. Probably, after all, it is not worth wasting your precious non-working time on them. Determine for yourself less useful things that can be abandoned without damaging the final result.
via 5 Boundary-Setting Tips for the Work Obsessed [Four Hour Work Week]