I will post my general asset allocation here, although I am not sure how useful it will be. Many years ago, when I settled on index fund investing, I picked certain percentages and have stuck with them. I would never argue that this AA is the best or most optimal, but I think it’s important to come up with a mix you’re comfortable with and stick to it.
My general goal was to have broad exposure to all freely traded, open market equities worldwide. Further, I have not factored in cash or bonds. We have a set amount of cash and CDs that we consider adequate. This cash amount is stable in absolute terms but will vary significantly as a percentage as the equity portion of our investments rises and falls with the market. I.e., in bull markets our cash may be only 20% but in downturns it may rise to 40% or more.
50% US large cap
25% US mid/small cap
25% Int’l, divided equally between MSCI EAFE and Emerging Markets
I use 5 Fidelity index funds, and rebalance at most once a year. Pretty lazy, if you ask me.
Edited to add: I’ve been retired for 11 years now and am no longer adding to my equities, buying and selling only for the purpose of rebalancing.