Activity for AJK<3

Lets get things straight, I'm average size and average weight for my height. I eat what I want I I don't really exercise. So I'm in no place to complain but How do you ladies get motivated to get in shape?! I tried weight watchers but I don't need to...

as in Seasonal Affective Disorder/ seasonal depression. I have been so grumpy and glum lately.. Wedding stuff makes me feel better sometimes. But ive literally been on here for like 2 hours looking and random threads like a freakin zombie. Anything...