For the longest time, I did meal planning monthly. I noticed that the fewer times I went to the grocery store each month, the less I spent. I am so bad about grabbing things NOT on my list because they are on sale or because they just look good (usually the latter)! So I would plan all of our meals for the entire month and do my grocery shopping the first and third weeks of the month. On my first trip, I’d get all of the dry and non-perishables for the month plus fresh foods for the first two weeks and on my second trip I’d get fresh foods for the last two weeks of the month.