I like to buy stuff from charity shops and resell it online. 1960-70s furniture used to be real hot years ago that's how I first used to make some extra side money when I was younger. I don't mean buying it and painting it with chalk paint or some crap. Just finding real undervalued items and reselling it on eBay.
I've bought a traditional cast iron bake stone for £2 and sold it on for £38
Chesterfield sofa in red with a bit of age (but broken in ones I think are the best) I paid £44 for that I think, was under £50 I remember that, as it came in and they had no room for it and sold it over over £500!
I used to buy parts from auction houses and resell them on, there's some big ones around my way that I bought Belfast sinks, plumbing parts and so on. I don't bother with either of the above or have the need to do any of that any more.
Saving money is making money. Don't spend your money on useless stuff that you don't need. Most people just buy luxury things to look rich. Ask yourself: Do I really need this? Think about what you will gain from it. Does it make more sense to buy this expensive watch or would it be better to invest this money in your business, making you more money down the line?
A good add on to this is, add it to the basket and buy it next week decide if you still need it. Or just walk out of the store and NEVER be affraid to say you will think about it. Buying on impulse is a slippery journey. If you want to spend 50 save 100 that's how I work.
When I was younger I always wanted to borrow money to get shit I didn't need or couldn't afford. I was once told instead of doing that find out how much it costs per month and just put that into savings after sometime If I still need it, go buy it. Id often end up with the cash to buy what I needed for less due to time past and have the interest id have paid away for borrowing at a high rate was mine.
Its far easier typing that than doing it.
People who struggle think winning the lotto or having tons of money will solve all the problems. It won't. If you can manage what income you do have now it will get 10x worse when you suddenly have a windfall.