Here's my advice, this worked for me anyway. Take a day off work, go out into the countryside without cigarettes or matches. Spend that day concentrating on the simple thing of not smoking. If there are fields and woods and trees well and good, but just spend the day not smoking. The crucial thing is day one. When you wake up in the morning, you have a whole day under your belt and it will make you feel so much better.
Nicotine chewing gum helps as well. Go for it.
As you mentioned, you will have some adverse reactions from the withdrawl, coughs, colds, the lot, but don't give in !