According to the Credit Management Association, Highrise "can be perfect for those missing an internal follow-up system."
By adding tasks to your customers in Highrise you create a follow-up (call, email, phone) task list for yourself. Making notes on each contact builds your history on each customer so that excuses for non-payment cannot be used again, you’ll know exactly when you faxed the copy of the invoice or when they said the check was going to be printed.
Do you use Highrise or another 37signals product in an interesting way? Let us know.