On my hikes (which are usually of the shorter variety, generally 8 or 9 miles and below), I have a 15$ cheapy buttpack with two 1/2 liter nalgene knockoffs. In it/on belt:
First aid kit with various bandages and moleskin.
A mag block with little attached rod-thing. 5$ at Walmart
Carkey on a little carabiner.
Granola bars, or various, small foodstuffs
Whistle (think it's a Fox 40)
SAK Huntsman
Either a Spyderco Endura or a Buck 110.
If longer, I'd probably bring my Buck 105 or RAT 3 + Charge TTi instead of the SAK or the folders.
The buttpack goes bye bye, and the bottles double in size!
TP, more food, socks, waterproof matches, and a sewing kit comes as well.
My walking stick's a 5 1/2 foot length of bamboo. Works well for the price
