Consider a charitable donation
One of the favorite tax avoidance methods of the rich is to make a charitable donation. This makes more of their money tax-exempt. But anyone can do this.
Recent changes from the Tax Cuts and Jobs Act have doubled the standard deduction. So, many Americans are opting not to itemize and take the standard. But donations are still tax-deductible. 
This will matter most depending on your income and how large a raise you receive. It's important to note, your donation must be to a qualified tax-exempt 501(c)(3) organization. Be sure to itemize your deductions when you file to reduce your tax bill. 
Choose your preferred cause and send it there every month. You can set up a direct debit with that charity. Keep track of the payments and deduct it from your taxes.