Mail to your in-house list regularly
If there is one mistake I’ve made in the past (and continue to make more often than I’d admit under torture) it’s not mailing to my list often enough. Your in-house list is willing to hear from you regularly if you approach them with great offers. Don’t be afraid of over-mailing to your list. It is virtually impossible to do.
Of course, before you can mail to your in-house list, you have to have an in-house list. I cannot over-emphasize the absolute necessity of creating, maintaining, managing, and using a database of prospects and clients as the core of your marketing program. With such a list, success is all but guaranteed; without it, it’s going to be hard to succeed almost in spite of the quality of your products and offerings.