The right option is; encourage selective and sustained attention
Children whose parents encourage selective and sustained attention typically do well in delaying gratification.
Selective attention is a type of attention which involves the ability to concentrate on one certain task for a long period of time without deflecting. Selective attention is very hard to achieve and it is useful while sustained attention involves the ability to choose from many conditions and to concentrate on only the one that you want while eliminating distractions.
Tommy would probably want to avoid triggers. People often smoke because they see other people smoking or it is a way for them to get over something. My tip would be to build self-confidence. You won't want to have to want to fir in or try to repair something. Also make a effort to stop. Constantly remind yourself of the dangers of smoking and how much better your life would be if you stopped smoking.