I think that the extra sauce packets is a great idea which I also have done, we do pay for the food we buy so why not ask for more and save it. The plastic Forks, Spoons, and Knives are great in a SHTF times were water is limited and this is a free way of getting some.
For the garden I do stay on the lookout for homes that plant flowers or trees and trash the plastic pots. I reuse them for planting. I have never purchase one.
I change my oil of the cars and save the old oil which has many uses in a SHFT times, even to keep a fire going. The old oil has so many other uses it is to long to list here. If you pay to change your oil you can ask for your old oil.