Commitment, and the perseverance to follow through on it.
Other stuff can be nice, but without these three, you don't need the other stuff.
Best advice. The other things only help... they won't get you out of bed in the winter and on the bike.
Originally Posted by
AdamDZ
IMHO:
Grippy, puncture resistant tires
Full fenders
Lights (good lights!)
Rack(s)
Waterproof pannier(s)
Basic tools
Spare tubes
Some reflective elements
Airhorn
Extra clothing if you live in crazy climate
I've got all of these as well, except the horn.