Can you give up alcohol cold turkey? This might be a big ask but what about for one full month? A no-drink month! Do this once every year. After 12 years it would be like you have given up drinking for a total of one full year. Even if you can't do this can you cut back on what you drink?
Wait for closing time at the supermarket at the end of a Saturday night. You will be surprised at what they will get rid of at a big discount rather than throwing it in the bin. We once got a full barbecued chicken for half price.
Raid your own bookshelf. This one is for people who really love books (you know who you are). Go through and form a pile of any you don't plan to read again. Now instead of having them take up space, jump on eBay, and let the bidding start. You might have a small fortune under your nose. This can also be done with you DVD nuts as well.
Remember magic mushroom air fresheners back in the 80s? Now we have battery-powered air fresheners which are smart enough to detect movement in the room. Why not make your own? Grab a spray bottle and fill it with distilled water, now add some essential oil and go to town.