Way to go on 12 days!!!! Almost at two weeks
Evenings are the worst for me, too. That's the time I'm ending work, looking to relax and unwind, enjoy a good meal, catch up with family. I also smoked the most during that time.
Some things that have helped me:
Staying busy. I used to shoot for the quickest meal I could make. Not so anymore. The longer I'm in the kitchen, the better. I'm keeping busy in there, my hands busy, my mind busy. Plus, the food tastes incredible!!!
Try going for a walk right after dinner. Even just a stroll around the block. Let those dishes sit until you get back.
Whatever you did as a smoker for your evening routine needs to change for the next week or two. Watch tv in a different room, go to bed early, do a puzzle, read a book. Whatever you used to do, don't do that now. Change your evening routine as much as you can. After a week or two, slowly begin reintroducing some of your older habits/routines back into your evenings. I'm 48 days smoke free, and I've only just gotten comfortable watching movies on the couch after dinner in the past few days. This was a huge trigger for me. I could watch them in the bedroom, but not in the living room/den. See where you can change things up a bit.
If the evenings are the hardest for you, give yourself the biggest rewards at this time. Treat yourself to something special at dinner (or dessert!); light that expensive candle that you'd never be able to really appreciate as a smoker; take a bath or shower with a super-nice soap or bubble bath. Indulge in something during those hours. It doesn't have to be expensive -- or it can be! You're saving a lot of $$$ from not smoking. Rewarding yourself is SOOOO important, especially in those first few weeks.
Congratulations on a job well done. Keep it up!!!!