DO create a unique, one-of-a-kind WSO that isn't a direct knock-off of another one someone else just listed.
DO give Warriors a better offer than you list on your public page or trust me, you'll be found out and it won't be pretty! After all ... it's a "Special Offer".
DO tell us what the darn thing is about! People don't want vague, random "see if you can guess" WSO offers - if they're ponying up the money for it, they want to know what they're buying. It's not like Woot dot com, where a "Random Bag of Crap" sells out in mere seconds. Detail the offer as much as possible, and sales will reflect your good sense of doing business.
DO give a guarantee. Fellow Warriors usually don't scam one another - and you should always stand behind your products. The number of refunds are very low, but your number of sales will definitely increase.
DO tell what rights come with the purchase. Let them know if it's PLR, for instance, what they can and can't do with it.