Developing new habits, even when it comes to something like saving money by eating more leftovers, is all about incremental changes. That's a lesson I've learned in the last few weeks with my adoption of Lakeland's inexpensive Freeze Pods (which will set you back £8 via Lakeland).
My problem with freezing leftovers has historically been with portion sizes. If I have a batchload of chilli, for example, I rarely have enough food containers to break it down into lunch and dinner sized portions and sometimes have to put the whole amount into one container. That makes it a real struggle to properly siphon off a share for a single person.