Banks are paying about 1%. That's a non starter. Stocks can have a lot larger return, but it comes with risk. Bonds of various types pay better than the banks, but safer than stocks. Real Estate can earn pretty well. Diversification is a good plan as well.
Say that you are in a market where rents run at near 1% of value per month and there is good demand for rental property. Take your million and buy five $150k homes for $750k. Invest the remaining $250k. Live in one and rent out the other four. Say you can get $1250/month or 0.83% per month. Your income will be $5k/mo or $60k/yr. Plus you have the $250k invested that hopefully gets 12.5k if invested at 5%.
There are costs in a rental business. I'd guess at least 10k/yr in not a little more.