Years and a few start-ups after that, I landed in a company was slated to have what looked to be a solid IPO, and I got a block of "Friends and Family" stock - shares which can give to whoever you want to purchase at the opening IPO share price.
I believed I owed much of my success to a few of my managers from my corporate days, who taught me as much common sense and good management as anything. Even though I had't spoken to some of them in over a decade, I tracked them down and passed on the opportunity to purchase the shares.
They were astonished to hear from me after so long, and even more astonished by the opportunity. Since they were still in the corporate world, or retired, the shares turned out to an unexpected windfall which had a real impact on their lives.
To this day I'm most happy about that result.