I keep a 5 dollar bill in my patch kit.

If I am far from from home and need extra calories, I
can buy some.

If you develop a hole in the tire (not the tube) a classic
short term fix is to put a folded bill between the
tube and the tire so the tub isn't exposed.

A vest is a great idea. A nice mesh so you don't overheat.

Watch for cars passing then making a right hand turn in
front of you.

Also for people opening parked car doors on the street side as you are
in the right lane of traffic.