If you wanted your work day to go by faster and could only cast on yourself, would you want to use Haste or Slow?
At first I thought Haste, obviously right? Wouldn't that just make me faster, and ultimately make it feel like time was moving slower?
If you used Slow, you would perceive time around you as moving much more quickly right?
I am not sure...I don't think my level is high enough to try either one. :/
But I think you might get more mileage out of either Barsleep or Refresh, honestly. :p
Alternatively, Invisible might help you get through your work day, but Smite of Rage sounds mighty tempting, also--especially for those who get in the way of your weekend. ^^