How many domain names do you have? If you're like most of us, you have quite a few to keep track of and make sure no expiration dates fall through the tracks...which can occur when you change companies and thus email addresses, just for one example. You should have a list, whether electronic or paper, of all your domain names, their expirations dates and user id and password info (and management URL) for each one.
I try to keep all my domains through one central service for easy administration. I am a huge fan of GoDaddy based services and have even become a reseller for them.
I set up reminders in my computer calendar of when my domains are set to expire and deal with them a week early.
Did you know that you have about 40 days to renew your domain names after the expiration date at the regular price, then they go into what is called a "redemption" period that lasts for about another 30-35 days where you can redeem your domains for an additional $100 or so plus the original registration fee? It pays to stay on top of these things. After about 70-75 days, your domain will most likely be released back out to the public. Don't let that happen because then anyone can "steal" your domain name.
Follow - Up on your Real Estate Domain Names today!