I use a CC to pay for EVERYTHING....gas, food, groceries, utilities, insurance, etc. Yep I even swipe my card at Tim Hortons everyday for my daily coffee that is $1.76.
The limitations of its use are only those that everyone else has such as mortgages and student loans.
Cash is sub-prime. I use CC's for everything. 
I use my credit cards for everything...doesn't matter what it costs. The only time i pull out my debit card is to pull out $40 for a bill each week that only takes cash. I wish i didn't have to do that. :/
I use my cards as though they were my debit card... and pif monthly. doesnt matter if its 250 worth of merch or 2.50 worth of diet coke... it all goes on the card.
@bribro wrote:I use my credit cards for everything. I get points, I build my credit history, I make my card issuers happy, and I can track everything on Mint.com. I especially like to charge small amounts to my Freedom card, which has the grandfathered 10&10 program - a $0.25 purchase nets me 11 UR points, which I value at $0.33, meaning the purchase was essentially making me money. I try not to do this with small, local merchants though because I feel bad about the swipe fees.
What do you use UR points for?
Lol @ cash is subprime
I too use credit cards for everything. No matter how much it is, if they will take my cc ill use it. I usually don't use a CSP or amex for smaller purchases though. I try to use my freedom or cash+ for those small purchases. And everyone should always carry cash. I always just carry a $20 but never use it unless I have to for some reason.
@Rhaeny wrote:
The limitations of its use are only those that everyone else has such as mortgages and student loans.
@Bigcrumbs - > Amex gift cards @ 1.4% cash rebate - > williamspaid to pay rent/mortgage @ 2.9% charge if you have a 1.5 point card like Chase Mileage Club it's paying 1 cent per point which is very lucrative, and with Mileage Plus after 25k spending a year you get 10k bonus for a 1.4 point redemption slightly above 1 penny a point which makes it very well worth it if you fly a lot. If you use the Venture card or Flagship reward (NFCU) you can still squeeze out 0.5% in profit, and if you use Flexperks card you can get upto 1.6 cents value profit towards your next plane ticket with any airline (3% card for everyday spending with Platinum checking 1.5 flexpoints = upto 3 cents)
Student loans some cards allows you to pay off student loans with rewards like the sally mae card and I believe you can do that with some Citi cards as well. But there are work arounds of where you can even buy crack from a dealer with credit cards so it all depends what your looking to do. For me I get 4.3 cent redemptions towards United flights per each point so it's very well worth it for me to pay 1% for 1.4 - 1.5 points.
Actually, before I found this site I used my debit card and cash for everything. Now I use CC for anything I can. A few smaller places prefer cash or debit so they don't have the swipe fee, so I respect that and pull out the debit. But everything else, CC. I think I've had the same $60 in my wallet for the last month. If I could find a way to pay my rent ($1400/mo) with a CC I absolutely would! Imagine the points I would accrue.... 