It's not wise to "spring" an organization on someone by surprising them with a cleaned and organized room.  It might cause more problems because the person may feel you've violated their space.

However a gift-certificate is a great thing. And Organizing Works makes it simple.

Just print the attached certificate, a 4 hour minimum is required, call me for prices.  And we can discuss the amount you'd like to give as a gift.  If your friend determines they would rather not use your gift, there's no risk.

The certificate is not valid until you pre-pay per a contract, but you can still give the gift with the hope that your recipient will want to use it.