1. If you're a business, accept payment by credit card.  If this is not possible, consider offering to pay for escrow services in the transaction.  Minimally, offer to alter the Admin Contact on the domain name record to the buyer's name as a "good faith gesture" before receiving payment.  The number #1 inhibition preventing a domain name transaction is the buyer's discomfort with an unknown seller in a unregulated market.
2. Try to assess the domain name's value to the buyer. Often a domain name's value to a buyer is higher than that of the seller.
3. Be reasonable.  The dizzying valuations you hear and read about are exceptions to the norm.  Most successful domain name transactions occur because they are reasonably priced.
4. Treat Internic as a partner in the transaction.  Complete Internic's domain transfer form properly and completely, and feel free to call Network Solutions if you have questions at 1-888-642-9675.

Appraise a domain name at 50% off today!

Hint:  Use this tool to augment your negotiating position by learning the value of a domain name you want to sell.