Know when to let it go
One of my startup ideas didn't take off as quickly as I'd hoped. So I borrowed money to keep going.
The business still failed.
More money didn't buy me time, it costed me time.
I spent one more year on a bad idea, plus another two years working to pay the debt off.
It was a bad combination of arrogance, and optimism. I didn't see what the evidence was saying:
“You gave it a shot, and nobody cares. Now try something else.”
My next business worked. I would have got there way sooner if I'd just been able to let go.