More tips:

1)My favorite "multi tool" is a Swiss Army Signature II Lite Knife.

-Very lightweight+pretty darned durable, I allways keep it nearby (in an outside handlebar pocket, or in a pants pocket).
-The tiny blade is suitable for cutting slices of cheese, pepperoni, zip ties etc.
-The scissors can be used to trim nails, mustache/beard, and as scissors on paper (maps, guidebooks ec).
-The nailfile/flatblade screwdriver is the perfect size for deraileur adjustment screws, and also works excellent to pry off beer bottle tops.
-The pen is handy, still works after a couple tours+a trek. Not the greatest ergonomic design if you write novels, but passable for short entries/notes.
-The red LED works great/and is pretty bright. I'm still on the original battery. Handy to find stuff in bags/do some short reading (you have to hold the button on) or find the bathroom in the middle of the night at a hostel, without waking everyone else up by turning on the lites. I've even used it to lite a trail when I was late getting back to camp after a hike, and didn't bring a regular lite.

2) Cycletouring I don't wear a bladder backpack, but take just the bladder (saving a bit of weight). I melt two holes (with a heated awl at home) through the extra plastic at the bottom of Platypus water bags. I then tie off looped reflectorized spectra utility cord through the holes. Makes for a simple handle, as well as a nifty hanger for hanging the bladder off of a branch etc. Super handy for using the bladder for a sponge bath/rinsing dinner ware/filling bottles. Triple/quadruple looping the spectra cord allows for a couple yards of it, with a shorter handle-but then bits of the cord can later be used to repair stuff if needed.