It's important to have a positive attitude; it's also important to have all the tools you could possibly need in the event of a flat tire/tangled chain/general bike fail. In Case of Emergency (ICOE) has all the essentials to get your day back on track.
Incognito multi tool- you'll want to hang this on your bag
Separate stash compartment
Saves the day when your morning commute goes awry
Includes Allen wrench, tire lever, 15mm axle wrench and screw driver