Yesterday, about 7 miles into my ride my front tire went flat. It has been many years since this has happened and I had gotten so cocky about it that I don't carry a spare tube, air supply etc.

Called my wife on the cell, she came and got me and the bike, drove to the LBS and got a tube, repaired the flat and no problemo.

But it got me thinking that I should be a bit more prepared. Don't want to carry a lot more weight/stuff.

Any suggestions on how best to be ready for the next one? Co2 the way to go,with a spare tube?