Investing in Tech: Due Diligence as the New Frontier

Get into a pre-IPO company in one of those key supported industries and grind for a decade, aiming to secure stock options.
Ten years down the line, you'll be in the same boat as the people who joined internet giants back in the day—riding the wave of the era. This is the biggest windfall a regular person can realistically hope to catch.

In high-tech sectors (think Internet-plus companies), check which firms the top twenty investment banks are fighting to back from the angel round through Series F. You can't go wrong.
(Private enterprises with state-backed investors are an even better bet.)
It's pointless teaching others how to find unicorns. Just because you spot one doesn't mean you can join it, just because you join doesn't mean you'll get options, and just because you get options doesn't mean you'll hold on long enough to ride out the pitfalls of cashing out. The waters there are too deep and the road too long. The so-called "ordinary people" who make it through all that are the top 1%. What you have must come before what you want. And by "what you have," I mean your capital—capital in every sense of the word.