Not every investing strategy needs to be complicated. In fact, the ones that tend to work best are often the simplest.
If I were starting fresh today and wanted a simple strategy I could stick with for years, I'd focus on just a handful of exchange-traded funds (ETFs).
Here's the approach I keep coming back to.

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Start with a global core
The Vanguard MSCI Index International Shares ETF (ASX: VGS) would be my foundation.
It gives exposure to more than a thousand stocks across developed markets, including the United States and Europe.
What I like is that it captures many of the world's largest and most innovative businesses in a single investment.
Anchor it with Australia
The Vanguard Australian Shares Index ETF (ASX: VAS) plays a different role in a portfolio.
It brings in exposure to the local share market, including our banks, miners, and dividend-paying companies.
That adds income through dividends and franking credits, which can be valuable over time.
It also creates a balance. Instead of being fully exposed to global markets, you're anchoring part of your portfolio in Australia.
Add in some quality
The Betashares Global Quality Leaders ETF (ASX: QLTY) is where I'd look for a slight edge.
This ETF focuses on global stocks that boast robust balance sheets, high returns on equity, and strong earnings.
For me, this adds a layer of quality to the portfolio without needing to do the research myself or pick individual stocks.
Keep it simple and consistent
The real power of this strategy isn't in the ETFs themselves. It's in the behaviour.
Regularly adding to these positions, reinvesting dividends, and staying invested through different market conditions is what drives long-term outcomes.
There will be periods where one ETF outperforms and another lags. That's normal.
The key is that together, they provide diversification across regions, sectors, and investment styles.
Why I like this approach
This kind of setup avoids a lot of common pitfalls.
You're not trying to time the market. Nor are you chasing trends. And you're not relying on a handful of individual stock picks.
Instead, you're building exposure to broad markets and high-quality businesses, and giving them time to grow.
Foolish takeaway
A simple ASX ETF strategy might not look exciting day to day. But over time, I think it can be incredibly effective.
With a global core, local exposure, and a quality tilt, I think this kind of approach has the potential to quietly build serious wealth for patient investors.