Commuted by bike for 16 years. Very seldom flatted (mayber twice a year).
Watch where you ride; don't ride close to the curb or gutter (that's where most debris ends up).
Personally we use 25mm Maxxis Re-Fuse folding road tires. Light, very puncture resistant.
When mounting tires try to avoid using tire tools; if you puncture, check for stuff stuck in tire. Check for tire cuts and debris on tire before/after your commute. Prevention is the key.