i would say that small changes that take a small amount of will power over a long period are far better than big changes that take a lot of will power over a short period - so ignore all advice that involves cutting out large amounts or making significant changes to your diet, you wo'nt be able to stick to them and any weight loss will therefore be temporary.
I'd suggest you do cutting back a bit on carbs, if you know wine is your downfall, go dry for a month (yes, yes, that goes back on what I said above, but that's not a food you crave and it's easier for most people to go dry than to go chocolate and bread free).
As you've done weight watchers in the past, you probably know what's good and bad for you, so limit your 'bad' foods.
I'm currently trying to shift 4kgs post baby weight. I'm determined to do it slowly to keep it off, so my plan (such as it is) is to keep the fruit bowl full of a variety of fruits I can help myself too when I'm feeling peckish between meals (telling me not to snack doesn't work - that's how I eat, and that is always my downfall, swapping snacking on crap to snacking on fruit/dried fruit and nuts is a good start - berries and grapes are good as you can just grab a couple).
I also know telling myself I can't have chocolate is doomed to failure, so rather than the mars bars that DH loves, there's milky ways in the kitchen (about a 200 cal difference!).
I found a breakfast of something like porridge or eggs and wholemeal toast is a good way to start the day, I don't snack in the mornings then. Worth the extra calories then to fill you up and break the habits.
I've trained myself off sugar in my coffee, that was v hard but it an easy change to make. I'm also serving at least 2 types of veg with every meal, I find I do end up eating twice the veg if there's a selection, which means I'm too full to pick at puddings.
Otherwise, try to build extra exercise in the day, I'm walking as much as I can (and yay, i'm managing to go longer in between filling up the car).