What does diversification look like to you!?

[Kegan Brenner]

My wife and I are currently starting out real estate journey. 1.5 years ago we bought a dental practice, and last year we purchased our dental office building priced at around $2M with $500k in equity. We currently max out our Roth 401k, Roth IRA, and $2k per month into our vanguard taxable account. I want to see what you all do (aside from real estate) to maximize that tax free (or in taxable stock accounts as well) retirement income. Would love to see how you all diversify!