A guy with his desk packed in a box(Photo: Courtesy of Men's Health)

But how do you know when it's time to bail from your current plum job and move on to even greener pastures? Here are five signs to look for before making your next big leap.

1. Everyone Is Having Fun Somewhere Else
Do you feel like you're missing something when you're sitting at your desk? Like time is wasting? Like there are other people doing more interesting things somewhere? Then maybe there are. And you can be one of them -- but you only have yourself to blame if in a couple years you're not.

2. You're Sketching Your Boss's Boobs
Do you find yourself drifting at meetings that used to be interesting to you? Here they are talking about the big summer marketing plan, and you're drawing pictures of the Controller's bosom. On the upside, it's a big one. On the downside, man breasts on an overweight 50-year-old MBA aren't that uncommon and shouldn't interest you at all.

3. Your BlackBerry Is Collecting Dust
Do you forget your BlackBerry at home more than once a month? Hey! Sparky! Your subconscious is trying to give you a hint. You have no interest in anybody getting in touch with you.

4. You've Got #Hashtag Fever
You're tweeting too much, which is the sign of a bored and lazy mind.

5. Your Boss Doesn't Scare You Anymore
In the early days of your current job, you would tremble at the sight of your boss walking toward your cube. But a few years in, there's no fear left. Your boss's moods and opinions are inconsequential, and as a result, so are yours.

And now, the hard part: Getting out. This can be done in the following order: Get your ass off your chair. Walk outside and smell the air. Get a resume together and send it -- from home -- to a number of cool places at which you'd really love to work. Start talking to people about what you'd like to be doing, without trashing your current employer.

Notice that little bubble of excitement rising in your chest? That's hope, my friend. And life is a pretty poor pageant without it. So get busy -- the only thing you have left to lose is your boredom.