Ok, let's address these triggers as I see it:
Being alone: You have us now so stick close, there's usually someone here around the clock.
Friends that smoke: Smokers hate losing one of their own that's why they're more than happy to give you that relapse cigarette. You will get to the point that you can be around them but it's best to distance yourself from them in the beginning of your quit.
Long car rides: This is where your air cigarette comes n handy. Some use cut straws, pens, even licorice to mimic a cigarette. Mine was invisible so I never had to worry about forgetting it somewhere. It's important that when you use it you go through the motions of 'smoking' it just like you would a real cigarette. It worked great at tricking my mind into thinking it was getting the real thing.
The after-workout- cigarette: Bring yourself a healthy snack instead. You can't eat and smoke at the same time
Phone calls: Again try using your air cigarette or talk somewhere that you normally don't smoke
Sex: Air cigarette again or sucking on candy
Food related triggers: Air cigarette or sucking on a piece of candy. I was stuck on soft peppermint puffs my whole first year.
I hope some of these clues help you out, you can do this, after all you've done it before