If you are looking for an easy wasy to rack up a bunch of free airline miles then you need to take this into consideration. We all have times when say we can and cannot use our credit card. Some people only use their credit card to purchase gas. Some others will only use it to buy groceries. Why are you only using it for those?
With how easy it is to pay for bills nowadays online you really need to have everything automaticlly paid for with your credit card. Of course you need to make sure you can pay the full balance off every month or other wise it does not make any sense to even use the credit card. No reason to pay some bank 15% interest on something you cannot afford.
Depending on the airline mile credit card you choose the air miles can really start to add up. All of your nomal bills you have to pay off every month like you car payment and mortgage payment can now start earning you free miles. Why not use your credit card to pay those? This way you can earn the free air miles and now you delay transferring over the money you have in your checking or savings account another month while you wait to get your credit card statement. You effectively would earn two months worth of interest in your savings account instead of just one for the item you were going to pay cash for. Now you earned the air miles and interest on your money in your savings account. Its your way of working the system in your favor. Again, this will only work if you pay the full credit card balance every month.
Get in the habit of using your airline mile credit card for everything. Your annual vacation or trip will be that much cheaper for you when it comes time to purchase your air fare. For some people it is a habit many people say not to do. These are the people who cut up all of their credit cards or put them in the freezer so they cannot get to them. As long as you know ahead time you can pay cash for what you are buying then you are okay. Automatic payments online will make your spending habits a lot easier and more rewarding. make the system work in your favor instead of the banks.