I have to keep up a pretty heavy exercise regime to keep the weight down (not off completely, I love food and cooking far too much for that!) I try to do an hour a day, 5-6 days a week, constantly switching it up to avoid muscle memory. So I might do cardio equipment at the gym 2 days a week, get in a 4-5 mile run another day when the weather is good, and alternate those days with pilates, kickboxing and weight/interval training at home. Doing something different every day keeps exercising from being boring.
And while I love to cook/eat, I try to follow a mostly Mediterranean diet - healthy oils (including not just olive oil but lard I render myself from my mom's pasture raised pork), moderate pasta & bread, lots of veggies and whole grains. I do a lot of Japanese "country"-style cooking as well and just try to avoid excessive fried foods and keep restaurant meals down to once a week (because gong knows what's in them half the time...)
My one dietary weakness is seriously good wine and whiskey, alas...but life's too short to not enjoy the finer things.