Your mind is still at the beach, but your face may soon be staring at a screen of 300 unread emails or your boss may hand you a backlog of jobs to be done by lunchtime.
The summer holidays finished this morning for many, work stress has jolted back into people's lives and the daily grind has resumed. Some workers will feel sad and a bit distressed about this. Welcome to the back-to-work blues.
But it needn't all be glum. Experts in happiness, psychology and mental health have some tips to assist in crank-starting work motivation.
The Mental Health Foundation suggests that thinking ahead to your next break and filling out a leave application might be useful.
"Having your next holiday or annual leave planned is a good idea and can help to alleviate the stress of being back at work," it says.