I have a separate frame-mounted pump on each bike, and a bag* on each bike containing a spare tube, puncture repair kit, and just enough tools to change a tube (wheel nut spanner, levers). I try to remember to swap my adjustable spanner, chain tool, and allen keys before each bike ride.
I don't use cycle computers and so far have mainly been using just my Fitbit watch, but I'm starting to use my iPhone and Strava - so I'll probably get one of those small top tube bags that will hold that and a supply of jelly babies, and swap it between bikes.
(*Bigger carrier mounted bag on my touring bike that I use for longer rides when I want to carry serious food, locks etc, and small wedge bags on the other bikes that I never really do more than around 20 miles on.)