In the beginning, label reading in the grocery store will slow you down. Realize that it takes longer and be patient. There are many store brands and off-brand low fat foods available that are less expensive than the national brands. Read the labels carefully. Buy fresh produce.
All fresh produce is low fat except coconut and avocado.
Fresh fruits and vegetables are less expensive and tastier than vitamin pills. Choose your meats carefully. Few meats have nutrition labels on them. You can always trim edge fat, but it's the marbled fat you can't cut out. If nutrition labels are not on the package, find the cuts that look the leanest and have the least marbling.