I've lost 27 lbs. since February, and am now 191 lbs. on a 6' 4" frame - at my target weight range, given that I'm an alpine skier in the winter, where having any less weight would be a liability.
For me, the formula was:
- Ride a lot, building speed and endurance as the miles increased.
- Use a HRM to ride into target zones (this was the biggest tool, in my mind, from February to June).
- Eat locally-grown food as much as possible - and try and make it organic, if possible. This is a good way to keep your weight naturally low without harping on caloric intake: lots of local fruit, veg and (if you eat it) meats that cater to natural biological cycles.
- When I cook, use fewer fats.
- Drink a lot of water and simple liquids.
- Get adequate sleep.
- Eat a good breakfast (this one was key, as it kept me from getting munchie cravings in the afternoon).
Note that I didn't really monitor caloric intake, though it's usually between 1,600 and 2,200 calories per day, depending on what kind of ride I have in the next few days.
Good luck!