I do a combination of several things:
. editor and publisher of a weekly newsletter, sold on subscription. I guarantee my subscribers 40 issues a year, which means 12 weeks off. The only constraint is that I must stop the publication when the industry is slow, ie in summer and around New Year period. FOr instance this summer the last issue will be on July 10 and the first one of the next seaon will be on September 18.
. consultant in market research, communication and market intelligence. As long as I can specify it in advance, I can always tell my customers when I can work for them and when I can't