I find I'm most productive if I work for 6-8 weeks, then have a week off, then another 6-8 weeks, etc. It helps clears the mental grogginess that builds up and

I find I'm most productive if I work for 6-8 weeks, then have a week off, then another 6-8 weeks, etc. It helps clears the mental grogginess that builds up and kills my productivity. So that's about 5-8 weeks a year (but they have to be evenly distributed).