10. Pre-formed meat patties
It can be convenient to buy pre-formed meat patties, but you sure pay a huge mark-up for the few minutes you’ll be saving.
It really takes next to no time at all to form burgers, and you have the added bonus of being able to season them creatively. If you’re still tempted to be lazy about this, you should know that there is evidence that pre-formed meat patties contain more E. coli than regular ground beef; most of the recent beef recalls have been for pre-made frozen patties.