What are strategies for achieving consistent productivity?

I have fairly regular bouts of attention deficit filled with youtube, games, in-depth research of mostly useless things. These episodes could last a couple of weeks. After that I typically have a couple of weeks of productive work - working much longer hours that I should, researching useful things, pushing work project forward and over-delivering. For every two inattentive weeks I typically get a one week over attentive time. I work with smart people of challenging things but this hasn't impacted my career - I still get good reviews as my output during productive weeks compensates for the non-productive weeks. This isn't a question on how to survive my 9-5 but how to achieve top performance. I've been diagnosed with adhd and would like to try alternatives to drugs.