Now ladies and gentlemen, at the onset of this writeup let me tell you that this is not taken from any Internet source. This is a personal feeling imbued thought provoking idea that kicked me when I came to the office and sat at the desk after a 7 day long semester break. The first feeling in the morning was, 'NO! I don't want to go to office!'/ 'Why do people need to go to office?' etc. And I am absolutely sure that my readers (colleagues) have had the same kind of feeling.
I'll suggest the things that work for me in this regard.
First of all, I remind myself of the good family and friends time that I spent during the holidays and tell myself, 'This will again happen after this semester.' Inside I try to look forward to that future.
Next I organize myself and list the things to be done right after coming back to office and get those done one by one, even if all the things cannot be done in a single day.
I start to do things slowly, not in a rush on the first day. The pace settles in and then I do fine in the next days. Having a good chat with colleagues around you about the things you did and things you'll do can also work like a tonic.
Overall, try to get slowly immersed at the work station and things will work fine with you.
And oh! Remember! We don't live to work!