I just smoke hookah and cigars. I've tried E-cigs and would say if you're gonna smoke a cigarette (which I've always found to be pretty yucky) it's the better way to go because the aroma is better and it isn't as clingy.
The biggest problem with quitting any addiction is that your brain has A. physical activities (holding cig, hand to mouth, etc). B. Associated habits (smoking cigs while at the PC, at the bar, etc).
Breaking those habits with a replacement activity is really good. If you *always* smoke when you're on the PC, stop and smoke only before and after for as long as you can stand it so they disassociate themselves etc, and drink oodles of water.
With nicotine your chemical addiction actually breaks pretty rapidly - it's just the habits and associations that drive you to smoke after the first several days of cold turkey.
If you do try to quit nicotine here are a few things you should be aware of:
You will likely perform more poorly at tasks in which you typically smoked during or before for a while (mostly due to distraction).
You will dream about it - often, many times the dreams will be so vivid that you will think that you broke down and smoked.
You may experience mood swings - frustration mostly.
You also will likely experience an increase in appetite because nicotine is a hunger suppressant.
Here's my rough guide to quitting smoking.
Buy a single pack and try to ration it as strongly as you can (I bought cigars by the box and hookah by bulk package - you can buy these things in smaller increments equivalent to a pack). Maybe only smoke once every 8 hours (that's how I started out). If that's too hard try for a smaller increment. Stick with that until the pack is gone. Go buy another single pack and increase the time by a few hours. The main thing here is that you are developing new habits to disassociate smoking with whatever you usually do. Also, when you smoke, do something unusual - have a walk, sit outside, don't do anything else or doing that anything else will encourage you to smoke in the future.
For the first week, try to avoid alcohol or any other things that may lower your inhibitions and thus allow you to break more easily.
Then after you start getting down to only having a few in a day (rations of 1 per 12-16 hours) you can try going cold turkey - it helps if you throw away any remaining tobacco at that time or you'll go fucking insane (don't shred them or otherwise handle them too much).
Also, put your smoking stuff in a place that's out of sight and somewhere hard to get to so you aren't tempted. I buried my stuff under a pile of random kitchenware so I'd have to pull everything out of the damn drawer and put it all back again just to have a smoke lol.
I know this isn't viable for everybody - but what really helped me was spending 3 days at my (at the time) gf's parent's house on a little vacation once I finally went cold turkey, just get away for a few days to a place where you can't smoke makes it 100% easier.