15 hours without nicotine (Edit: I'm pretty much a non-smoker now :p)

..and I just smoked one.
care to share your best tips to finally quitting?

EDIT (after having read 99%):
So, thanks, guys.
You helped me out a great deal, here :)
Interestingly enough, while reading and commenting all posts, I haven't had a cig :D

I will consider everything you guys suggested, but probably will buy an e-cig starter kit from a local shop.
I guess, for now, I need the habit more than the nicotine, so a 0mg nicotine e-cig seems like a good solution for the transition.
In a couple of weeks, or so do I hope, I'll be finally clean. Clean forever :)

Thanks, guys.
I'll leave this thread open for you guys to be able to discuss the topic in more detail, if wanted :)

EDIT 2 (2 weeks after OP):
Yup, I'm pretty much a non-smoker now :)
It's been over a week that I ordered and recieved a ego-c starter kit and I LOVE it :)

Thank you folks for making my life MUCH better :) :)