Unless riding solo in the boonies I've gone to a chuck and a couple of CO2 cartridges.
Used to carry a Genuine Innovations combo CO2 Inflator/pump, which actually worked well for being 7in long. Clamps onto a presta and stays there while pumping - or screw a CO2 on and use it as an inflator. CO2 cart attached to opposite end makes a good pump handle (as pictured). Not a precision tool, but is 10-11 years old and still works like new. Light, easy to pocket/snap in cage bracket, and reliable enough for emergency backup. When carrying just a couple of CO2's seems "risky" I will take this along - I know it and a patch kit will get me out of a jamb in the middle of nowhere. That said, if your reality is that you puncture frequently and ride in the middle of nowhere, you might want something more substantial.
Think they're out of production now but no doubt someone still makes something similar.