You are asking for help falling asleep … In the coffee room? Oh wait then again this thread IS under decaf …
In all seriousness, (who me?) Are you physically active during the day? (Walking, jogging, sports, etc) because if you tire yourself out even a little bit, the way the body works is if it has even a small amount of energy to fill back up it is easier to fall asleep because the body is tired (now why am I up? That is a good question)