Contribute at least what you company matches, but do more if you can. This reduces your taxable income. Add Roth 401k if you company have this option to offset your future tax obligation on the regular 401k. May that $2-10 dollar professional management fee so a professional from (usually the asset company/broker) will manage and grow your account for you rather than you letting it sit idle and loosing in a bad market. When you’re ready to retire, make sure you’re in a lower tax bracket