My tip is to invest in a vac sealer, I LOVE ours!
I cook basic things like meat sauce, casseroles, soups and vac seal a serve and then freeze it at home. Then all you have to do is stick the packet in a pot of boiling water until heated through, cut open the bag and voila - there is dinner! Soooo quick and easy for when you've been travelling all day and there is not enough daylight or energy left to actually cook something. It's even easier if you think ahead and move the meal out of the freezer into the fridge section so it defrosts while you're driving.
Also useful for freezing meat as it keeps for much longer when it's been vac sealed.