Our throw away society has begun to irritate me. Therefore, I have become a COB (Cheap Old Bastard). I grew up in an era when you made do; you didn't throw it away or buy a new one, just because one bit broke. So, welcome to the Tommi Potx COB Recycling School.
I carry a bit of inner tube, paracord, duct tape, zap straps and a multitool whenever I venture into the wilds. I am almost invincible with these items.
With these, you are a repair god.
Step 1: Strap Retainers
I know this is a little OCD, but I hate it when my pack is all rigged up, and there are all these spare bits of strappage hanging around all over the place. This is especially true of more recent packs / load bearing vests. I use slices of bike inner tube about half inch wide, and wrap them around the offending strap after I roll it tightly to the pack. They are also handy for use elsewhere, as they are already on your pack.(Note paracord zipper pull in background)
Step 2: Laptop key
Yes, a lap top key. About a year ago, the /? key went AWOL on my laptop. I took a small rectangle of bike inner tube, and wedged one end under the .> key and the other under the shift key. This keeps the all-important little rubber thingy in place. (Without the little rubber thingy, you're hooped...unless theres a 'little rubber thingy' Instructable out there.) A small piece of white surgical tape can then be stuck to the rubber key, and the / and ? can be drawn on. Beware, this is temporary, and may require adjustment from time to time.