Discipline - how do you get it, how do you keep it?

It's been a rough month, summer, year... I've been struggling to get this weight off before the big 4-0 in September and it's just not happening. I jump head 1st into something (Weight Watchers, 5K training...) and then get bored, lazy, fall off the wagon, whatever you want to call it.

How come some people are so disciplined about getting in their workouts and/or eating the right things? Are they born that way? Do they just want it more than others? I wish there was a pill I could take to give me some discipline because I seriously am lacking that gene! lol

There's not a lot of workouts for the month to update:

Sun Jul 13 - got to the gym for a 75 min workout (treadmill, bike)
Sat Jul 19 - Walk Away the Pounds dvd - 3 Mile w/ Stretchie band from her 5 mile dvd (40 min)
Sun Jul 20 - 3 Mile Express Advanced Walk dvd (49 min)
Wed Jul 23 - went to the gym BEFORE work and got on the treadmill for 50 min
Sat Jul 26 - 4 Fast Miles dvd (50 min)

and that's it my friends - pretty pitiful. And if I listed what I had eaten over the course of this month - even worse!

I'm going to try to start fresh (again) beginning today. Maybe if I come here more often and journal it will make me want to be more accountable to whoever may be reading...