Non-kid stocking stuffers.  

I see you live in Canada where it's cold (like here where I live), so how about some stuff for his car: lock de-icer, one of those air freshener thingies, a new ice scraper with a built in glove, a can of 'fix-a-flat', an air pressure guage (for the tires) that is a different type than what he has; there's a zillion ideas in the auto aisle of any store. I always give my son-in-laws those little packets of hand warmers, I can't think of what they're called, but you snap them and put them in your gloves, etc, and they radiate heat and keep your hands warm if your car breaks down and you have to be out in the cold. Other thoughts: a cd of somebody they like to listen to, some after shave in a scent YOU like (hehehe), a hand-held game (like poker or something), a packet of free food coupons like for Starbucks, McDonalds or whatever he likes. New wallet, key chain with something memorable to you both on it...the ideas are endless, lol!

What about some tickets to a movie or concert. Or, a gift card.

You can get very unusual pens these days with feather, cartoon characters and some that light up and bling initials are nice and you can get them very cheap these days....

Cologne samples
$5 blockbuster card (if he likes video games or watching movies)
They have coal candy... you know like he was bad so he only gets coal for xmas
You could make coupons for a romantic dinner, a date of his choice, etc.
How about razors
Make a mixed CD for him
Does he like thinks like beer nuts, sausages, cheese spreads?
What are his hobbies? Pick small things related to his hobbies.
Is it a boyfriend? You could do some fun/bedroom type things - like romantic/naughty dice, naughty scratch offs, etc
You could do scratch off lotto tickets
Does he like flavored coffees? You can put some mini packs of those in.
How about travel size shaving creams, after shave, things like that

It's hard for me to help because my fiance loves my products... I always give Bert's Bees lip balm, cologne samples, soaps and shower gels... things like that.