There are very few ways to decrease taxes anymore, unless you are rich.
For the poor, there are none.
For the middle class they almost all involve depreciation. you can purchase commercial real estate or develop in disadvantaged economic zones. Massive front loaded depreciation. Also, you can really take advantage of Section 179 for business property.
Some other ideas...
The property refinance game. As your prop holdings increase in value refi and take the cash out instead. Since it is a loan you don't pay taxes on it. Please don't do this on your primary residence. There are a million videos about how to do this.
You can use Roth rules and creatively use real estate investments within the Roth (example - since a sporting ticket is technically a super short term real estate lease, you can probably buy and resale tickets using Roth funds and keep profits within the roth tax free - this is a little scary and if it is legal, it won't be much longer)
You can tailor your comp so that it is bonus instead of salary. By doing this you can maybe get around self employment taxes since those are tied to salary. I see a lot of accountants bring this up but I don't do it as I think you are asking for trouble.
For the rich it is all easy... since of course the rich wrote the rules. When you are rich just don't take any salary. All comp should be in the form of stock and options, which aren't taxed until sold. Just let them stack up and take loans against them with the stock as collateral. Loan proceeds aren't income so you declare nothing, you live like a king. I am not sure that there is anyone in America making more than 5 mm a year who pays a cent in taxes because they pretty much all do it this way. Elon just got a 29bn package with a taxable amount equal to $0. Not a penny in taxable income from 29bn. All options and stock.