I was a heavy smoker for 4 years.
I feel much, much better after quitting and my life has changed completely. Here are a couple of reasons to quit:
- Addictive
- You become lazy and completely unproductive
- Problems with memory (which affects your work significaly)
- Relationship issues (romantic, friends, family)
- Bulls*** yourself that its actually good for you and it helps you
And I could go on and on.
BUT...i know a guy that was very productive and effective while doing it occasionally.
See for yourself, but be wary of the traps.