Avis is a really great place to rent a car, if your over 19 and have a credit card... they are a god sent, unlimited kms the works - they give a gov't rate too!
Any hotel, as mentioned by pretty much everyone!
When we did the Ice Storm (not to be confused with TO's snow storm) we got free coffee and donuts... they seriously wouldn't let us pay!!
Pretty much any outdoor store has a mil discount --- just have to ask... be brave.
Marine Land (or any Busch park) in Florida has a Military discount. The US Mil gets in free, Cdns get a discounted rate.
Always ask if your in the States, always... although Disney World doesn't have a discount at all... ... ...
The YMCA in west Ottawa does not offer a mil discount, which really sucks 'cause they used to.
I also get a discount at my car dealership when I bring my car in. I get the fleet rate... maybe it's 'cause I go in in uniform?
Oh, and theres a really great sandwich shop in Ottawa near Preston and... can't think of it... "Anzios" I think. $3.50 for the best sandwich ever... and sometimes its free too!!