“Don’t write checks until there’s money in the bank.”
Richard Crenian discusses how imperative it is to not promise or pay another until and unless you have the funds to back it up. Communication is crucial. You can always let you creditor know when to expect the money at a future point and when you can, in fact, make good on your debts.
Another crucial point to remember when attempting to sell a product – go straight to the person who has the authority to say “yes”. Don’t waste your time on someone who does not have the ability or authority to give you the outcome that you have in mind.