Pick a few things you can put your money into, which you have confidence won't lose value given a long enough time horizon. For me, this is SPY (highest alpha but needs 10 years to recover). The traditional 60/40 SPY/TLT mix is great. Currency funds also good. VTI & chill is good. Right now the Euro has Dollar parity (ECB isn't fighting inflation aggressively and won't start reducing its balance sheet for a while), maybe throw some of that into the mix.

Sell covered calls to reduce your cost basis.

Don't spend cash. Invest cash, borrow against it at favorable interest rates, and make purchases with the borrowed money. SBLOC, portfolio margin (>100k) can unlock some cheap (75bp above prime) cash.

If I could send a message to myself 20 years ago it would be the above.

All of my words are nonsense, nothing in this comment shall be construed as professional or financial advice. I've been excessively stupid with money far longer than I should.