A patch kit when commuting is not of much help - takes too long, chancy in really dusty or wet conditions. Better to carry one good tube (or for very long, rough commutes, two). A hand pump, tire levers, rag, spoke wrench and multi-tool or screwdriver/allen combo tool in addition should be sufficient. Practice changing your tube a few times when you don't have to.
Last edited by cny-bikeman; 06-02-16 at 06:28 PM.