Stay away from doing anything and I do mean anything on Impulse. That great domain you see available will still be available tomorrow. Take time to investigate your own domain/s especially when offers are received before agreeing a sales price. Be your own worse critic. Take a business mind approach - No alcohol when making decisions. If your questioning a decision, step-back from making it for at least 72 hours. Put in genuine work in regard domains, not just a pondering/browsing approach.
Finally try not to be over-influenced by others - Your either Good at this, or your Not, You'll soon find out.