I'm better now and want to quit smoking soon

Hi, now that I've started to feel a little bit more like the usual me. My humour is definitely more stable. The only thing now, is that I'm having a hard time to maintain a good sleep schedule because I work nights..but I guess that's part of working the night shift. I've been debating on the best time to stop smoking for the past weeks. Also been wondering about the best way to do it. I want to stop because of many reasons but I still like smoking and I know it will be hard but so much better in the long run. I'm also afraid of being moody because of the withdrawal from Nicotine and I'm sure I'll be cranky and anxious while I have the urge to grab a cigarette. I was thinking of asking my PDOC for medication but when reading about that I found that it may not be good. I know I can talk to my PDOC about it at my next appointment but until then, I'd like some feedback on this.
Give me some tricks to ease things off so that I can't kick this habit and keep my sanity and not drive everyone around me nuts.
I don't smoke in my house, I smoke in my outdoor heating shed and this is also my TAKE TIME OUT SPOT when I'm not feeling well or need to be alone, my spot to go on my PC and to do craft projects ahhh. I've joined a stop smoking thing on the net, set my stop date and well that's where I'm at.