Ender:- FYI:- It is Ossur Min haToroh “veNishmartem Me’od leNafshoseichem” to ever smoke:- Period!!
Have different outfits for each day, such as a light grey suit in addition to a dark suit, and several ties & cufflinks:- This will keep you somewhat occupied & distracted.
You may also care to go to a Hashkomo Minyan 1 or more of the days, putting you on a different schedule, in addition to not going without food until lunchtime for 3 days running. Eating at regular hours:- i.e. Breakfast time, takes off the pressure to gouge down a huge lunch.