Slow Cooker Tips - How to load a slow-cooker - video - Brown meat 1st. Put whatever is longest to cook on bottom, fresh veggies go in first, then add meat. Only fill crock 1/2 - 2/3 full. If less, food cooks too quickly, too full, food cooks improperly. DON'T lift lid, NOTE: add :20-:30 every time seal is broken, unless adding tender veggies or thawed-frozen veggies. Pour liquid last over top. NOTE: most meat = 8 hours cook time.