Great question! I'll ask my husband, he mentioned something about "bunching" and it not working out for us. I think we don't give enough? We only donate about 5k a year.
Some people (usually rich people) attempt to "bunch" all of their deductions into a single year, and then claim the standard deduction the rest of the time.
For example, if you're MFJ then your standard deduction is $24k in any given year and if you only have $10k of itemized deductions (charitable contributions, etc) then in any given year you're charitable donations aren't tax deductible anymore because they don't exceed the standard deduction you're going to get anyway. But you can donate the exact same total amount if you give $30k to charity this year and then zero for the next two years, while claiming the $30k deduction this year and then the $24k standard deduction the next two years. Over the course of the three year cycle, you would pay less taxes by giving 3x as much 1/3 as often than you would pay if you gave the same amount every year.
The newly increased standard deduction was designed to be slightly above the average amount that middle class families itemize, to force them into the ("simplified") standard deduction. So you'd think that millions of middle class families would benefit from this bunching strategy, but the problem is that most of those itemized deductions aren't charitable donations that can be easily moved from one year to the next. For most of us, a big chunk of our itemized deductions are mortgage interest and property taxes, and most jurisdictions explicitly prohibit you from deferring or prepaying those to move them into a different tax year.
Wealthy families with more than $24k in itemized deductions can still itemize every year, but they only receive benefit for the amount of their deductions that exceed 24k, instead of the amounts over 12k like it was before. So a family that makes 150k and itemizes 25k per year now gets 1k of benefit instead of 13k of benefit, which is not nothing but it's not nearly as good as it was before. At the same ratios a family that makes 1.5million and itemizes 250k per year now gets 226k of benefit instead of 238k of benefit. So in terms of overall effective tax rates, the newly increased standard deductions means very little to super rich people, but is a dramatic cut to families with more moderate incomes.