John Robb wrote once about the creation of new habits. Lisa Williams followed up by noting that habits are so routine, so habitual (get it?) that they're invisible. So the biggest challenge with breaking bad habits/beginning new ones is merely identifying the habits you have.
Changing your environment -- either by moving yourself to a new location, or morphing your surroundings in place -- is a good way to deal with this.
Coaxial cut: One thing I like to do every few years is to live without cable for a while. I cancelled cable last March, but the technician finally showed up last week to snip the wires. I was able to pick up and finish Kite Runner in a surprisingly short burst of time. (A nice read - recommended!)
Habit shakeup, extra credit version: this week I finally unhooked my landline phone, since I only use my cell and will probably be moving soon. My DSL account was attached to my landline (as was my long distance account, which I didn't need, and my Yahoo mail account. What a big, tangled mess yeeaauch $#%@! SBC!) So I bit the bullet and unhooked it all. No tv, no Internet.
Day three of no DSL - the result, so far: My home is now the equivalent of a Frontier House reality show set; it is indeed rough. But the limited choices force me to be a pragmatic websurfer, or as Andy and Dave would say, I now surf by intent, instead of by coincidence. When I'm at home the urge to just hop online and look something up ("I wonder what Wikipedia says anything new about Flying Spaghetti Monst - oh yeah, I'll have to wait until Underground Cafe opens") the old habit is felt. It's an undertow.
But this inertia is to be expected. As Stephen Covey says, a rocket taking off from the earth uses, like...a huge percentage of its fuel in the first uuuhhhumpteen meters of it's trip. (While Covey may never be forgiven for polluting every day conversation with "paradigm" corporatese, his book did have a few worthwhile tips.) In other words, expect your new habit to use more energy in the first two weeks than any other time it is practiced.