I've always been big on paying cash for everything but after speaking with some fellow Getbiggers via PM, I've gotten an AMEX business card and am going to put everything on the card and pay it off each month to get the points and rewards....just to see how it goes.
It will go very well as long as you follow the rule of paying it off before it accrues interest. The points are a bonus. Not having to carry around cash to pay for incidentals is also a huge plus. Additionally, even when you never accrue debt, you're credit score will reflect your sensible credit card management. When you want to buy something, like a house, which you may not be able to pay cash for, you will be amazed at how much your good credit history saves you in interest.
Recently, I financed the purchase of a new car. Because of my exceptional credit rating, I am paying a rate that is less than the already low credit union advertises. My mortgage interest rate is as low as they go for the same reason. The only danger is that creditors seek out folks who have great credit and are no risk. If you take advantage of everything you are offered, you could end up in debt. My rule of thumb is if I cash out an investment to pay for something that investment must earn less than the rate I am getting to finance it, by a lot. Once you cash out investments, you may never fully recover them.