That's a great question, Lisa (great name too). Nothing has surprised me TOO much, because I guess I always knew how to do this -- I just didn't want to do the work. Or I wasn't able to do the work yet, I'm not sure. I do wish I'd known just how much I would fall in love with running, because I would've started it sooner and I would NEVER have cared about running in front of people. I got over that pretty quickly, though, which was kind of a miracle for me. There are things I'm glad I DID know, and here they are, in case it helps anyone!
1. You don't have to eat cottage cheese and cauliflower all day. You can have "bad" things like high-fructose corn syrup every single day and still lose weight. Yes, it's true! Obviously some people have issues with various kinds of food, especially if you're diabetic. Now that my disclaimer is out of the way, let me repeat: YOU CAN EAT A LITTLE BIT OF WHATEVER YOU WANT AND STILL LOSE WEIGHT. Most people know this and still choose not to tempt themselves and so they forbid certain things to avoid a binge. This doesn't work for me, and I'm just glad I always knew that I didn't HAVE to do that. Quite honestly, that's probably the biggest reason I've been successful, believe it or not. If I completely eliminate something from my diet, I WILL binge on it. It's guaranteed. If I allow myself to have a little and fit it into my calories for the day, I'll be happy and I won't have a REASON to go off plan.
2. For me, this one is absolutely true and is the secret to my success so far. I've learned that I have to keep track of my calories (or WW points) ON PAPER. If I don't write them down (some people use Fitday -- same concept), I won't be as likely to stay on track. A 50-cent little notebook that I carry on my purse is probably the BEST thing I've bought for weight loss (that and my running shoes, maybe).
3. You can't use a plateau as an excuse. I used to go on diets and then slack off a bit and hit what I called a "plateau" and deny the fact that I just wasn't sticking to the commitments I'd made in terms of eating and exercise. Our bodies DO hit plateaus sometimes (though I can't say I've really seen one yet this time), but we have to make sure we're not tempted to use that as an excuse or to justify our slacking off with "Oh, my body's just not letting go of the weight right now." It may very well be true, but we have to make sure we're doing the right things. Since July, I've hit a few snags where I didn't lose anything and one week where I gained 2 pounds, but I can point to exactly why. I wasn't diligent in the prior week or two (sometimes bad behavior has a delayed response on the scale!)
I've probably rambled enough.