We all know that the office is the best place for practical jokes. Take these guys for example. If you're suffering from Monday Morning Syndrome, snap yourself out of it by watching how this guy deals with cubicle cabin fever. If one of your colleagues is off on holiday, you could always try whiling away your Monday morning planning for their return, by getting some ideas from Bore Me's office pranks.
If it's inspiration for the Monday morning meeting you're in need of, you could always amuse yourself and your work mates by instigating a game of office dare. See the BBC (now you know where your tax payers money's going...) for the rules.