Kinda been through that myself this year.
A few words of advice, if you care to hear them:
- do not sacrifice on food quality, sleep, or health in general. That'll bring you nothing good.
- find other places where you can save money. Identify and reduce waste first
- when you make less money, you have a lot less disposable income than you would think. Say you earn 25% less next year, but your fixed costs (rent, food, health, insurances) take up 60% of your current earnings. It means you'll have less than half the disposable money you have now. (100% - 60% = 40% of disposable income today. -25% diminished earnings next year, you only have 15% left.)
That being said, after struggling for an entire year, I think making your life cheaper is a good choice in the long run. If your time is cheaper, you can invest more of it into vacation, leisure, health, or simply your next product.
Good luck. Tough times ahead, but if you're careful, you could be a lot better off soon. Not richer in money, but in everything else.
Don't forget to sleep!