for a family of two, if you max out tax-sheltered contribution, then]
1. $17,500*2 for 401K=35,000
2. Roth or Traditiona IRA = $5,500*2 = 11,000 (accelerated contribution allowed for 50+);
that is $46,000 sheltered from tax, and we are not even talking about:
1. employer contribution;
2. 529;
3. life insurance, etc.
of course you need the income to qualify.