Test yourself until you're bored. Check every mistake. And above all, don't marry any idea. If the data shows that something doesn't work, change it mercilessly.
Test yourself until you're bored. Check every mistake. And above all, don't marry any idea. If the data shows that something doesn't work, change it mercilessly.
Do not seek perfection. Seek strength. A good system is not the one that earns the most, but the one that loses the least when everything goes wrong.
And remember: the worst system is the one you never finish because you're always improving it. Throw something, operate, adjust. That's how you learn.