Buy in twos -

Buy in twos.  Again this is not anything new, but it works well for me. I buy two of almost everything. 

Shampoo, grapefruit juice, baby wipes, egg whites, just everything. The first one disappears quickly and the second one buys me the gift of time.  

So if I am totally pooped or swamped or whatever I do not have to go to the store that instant.  I have worked in a day or five to get to the store to stock up again.  When I open the second whatever that is my mental cue to add that item to the grocery list.

I would not mind if I bought luxury items in twos.

But in reality I buy double cartons of egg whites.