When communicating with your audience choose the simplest, least complex channel to reach your audience.
Once you decide on the channel, decide how often you will use it.
For example, a simple scheme with four 'channels' might be something like this:
Channel 1 -- personal blog.
Frequency -- three to five blog posts a week. Each post 130-150 words or less.
Channel 2 -- email.
Frequency once a month. NO SPAM, fan must ASK for and WANT email.
Channel 3 -- facebook.
Frequency once a day. Less than 25 words. About half of the time, use a picture.
Channel 4 -- personal appearances.
Frequency: four times a year. Book signings, workshops, speaking.
(Taken from notes made during Scott Kirsner's Building an Audience Seminar at Bay Area Video Coalition, on Dec. 1 2009.)