Maintaining an email list
It's email by the way not E-Mail, E-mail or e-mail.
Starting now make a list of people who you can always send your business advertisements. Keep in mind this mail is coming from you. The best thing that you can have on the Internet is your good name.
You now have the beginnings of an e-mailing list. These people are interested in helping you. Do your friends a favor and always, ALWAYS, use the BCC (blind carbon copy) to send multiple e-mails. No one wants their addresses passed around and around.
When you are collecting new names for your list, remember that your own customer list is always the most valuable.
Do it right and play by the rules.
Large list may need to be outsourced.