1. Freeze vegetables/fruit in portions
I have every intention of using up my vegetable box but things get in the way and it turns out I'm only home twice that week. As a result my vegetables are left languishing in the back of the fridge. I have now gotten into the habit once a week to look through my fridge and decide which veg is looking a bit sad. I make sure to chop them up and freeze them in useable bags to be used at a later date. I always bag them up in portions so I can use them in one go. Root vegetables tend to go a bit watery but they last longer in the fridge so I don't tend to freeze these. I always freeze slices of lemons and limes as they work great for G&T's when you have guests over. Butter, milk and bread are always great to be frozen and I do this regularly.
2. Make stale bread into breadcrumbs
We tend to treat ourselves a nice loaf of bread for the weekend as our go-to breakfast is poached eggs on toast. But as we never eat bread during the week it starts to go mouldy. Now I either freeze it in slicers or I pop it in the food processor to make it into breadcrumbs. I freeze these and use them as toppings for various things such as gratins and cauliflower cheese. My New Years resolution next year is to start getting into making my own bread so I never have to buy a loaf from the supermarket again.
3. Freeze sauces in ice cube trays
We always have a jar of pesto or curry paste in the larder but it doesn't always get used up in time before it went off. In a household of two, unless you use it everyday you're never going to use up a whole jar within three days. So I started freezing it in ice cube trays as soon as I opened it. I find three cubes of each tends to be enough when I am using them for dinner. This also works well with fresh herbs - just make sure you add some water. If you freeze rosemary this makes a good gin garnish.
4. Don't follow best before dates
Before I moved out from home I was a stickler for best before dates. I would throw something away on the day it had printed because I didn't think it could be consumed anymore. Not only is this incredibly wasteful but also very expensive! Now I go by looks and smell. Most food have at least a couple more days left on them past the best-before-date. You just have to use your common sense. Most veg which looks a little sorry for itself perks up in a soup or roasted.
5. Batch cook for the week and freeze
If I know I'm going to have a busy week but got a full fridge, I make sure I cook up quite a few different meals to use up all the food when I have the time. Mostly on a Sunday afternoon. I either pop them in the fridge for lunches throughout the week or freeze them for dinner for the rest of the week.