My Swiss Army "data" knife does most of the cutting, snipping, and other pocket-sized jobs I need to have done. It also has a 32GB USB drive with fingerprint reader, and a tiny .5mw laser pointer. No corkscrew, no tweezers.
Slightly larger slicing is handled by my Benchmade Mini-Barage assisted-opener. I like the knife so much, I bought a backup just to be safe. A few weeks ago, I thought I lost it, so I went immediately to my backup, and ordered another one so I'd still have a backup. Then I found the original on the floor of my truck, so now I'm doubly safe with two backups.
For a backup to my Glock 33, I have a nice Spyderco "Massad Ayoob as a backup to my Glock 33.
I don't often take a knife out of my pocket, but when I do, I want it to perform. :)