“Well, I’ve already got so much into this crop, might as well see it through...”

“I spent a whole lot of money to start this project, so I need to spend more money to get it done.”

If you hear yourself saying this, do not make any sudden movements. You are about to sink a decision by considering your sunk costs. “Sunk costs” refers to money that is already spent. No matter your next decision, that money is G-O-N-E with no recovery, so if you try to base your decision on those costs, you could end up throwing good money after bad.