My wife and I are also working on some eating and excersize changes.
If you haven't done so, rent the DVD "Food INC." and see what you think. There are a couple others out that are worth watching as well, but I haven't gotten my hands on them yet.
One thing I've just stumbled over is the danger of sugar substitutes, especially aspartame. Worth doing a google search and a bit of reading. We put some effort into cutting out sugar as much as possible, and trying to drink more water. But we're not always crazy for just plane water. We started buying those powdered drink mixes that are sugar free. They taste great and we've been drinking a lot of "it." And then I did some reading the other night *gulp*.......some of what I read states that the liver spends so much energy breaking down and processing the toxins in aspartame that it actually makes a person gain weight because the liver isn't processing the rest of what you're doing fast enough. I think we've been experiencing that because we don't eat fast food at all, don't drink sodas or each chips or any other "common" offenders, and we actually eat really healthy. But if anything, we're creep up a pound or 2 a year and keeping it. Doesn't seem like much, but add it up over time and it's quite a big of stuck-on weight.
So now we're trying some herbal tea type blends that are caffine free and seeing how that goes. So far, so good. We just drop a couple tea bags in a glass pitcher of water, place in the fridge and by morning, it's a mild flavored drink. Add some lemon juice from a real lemon and that's it.
We're also back on our 3.5mi walk/jog in the morning and working toward more run time and less walk time. It's not that far, but it's what we have time for.