See I knew there were some people with good intentions that didn't redeem for Healthy Choice purchases.
make sure you check out these pages and for some free miles check out Mileage Addict's:
http://www.mileageworkshop.com/
Make sure you concentrate your activities on one program since you don't fly much and try to pick a program that flies where you want to take your rewards! Keep boarding passes and receipts because you don't always get miles credited properly. Also check out which airlines seem to give rewards out the easiest to non frequent flyers like yourself. Some are pretty stingy especially on popular routes.
Lastly, never lose the opportunity to make your miles, especially after you have laid out cash for a product, service or flight!