I have never ingested marijuana or any illicit drugs, but you could help the budget by legalizing a fairly benign substance in marijuana as i-1068 would have done. The polling data is fairly neutral regarding this topic in Washington state. Both state polls I have seen show legalization favored by slightly over 50% though.
You would be doing this in two ways. 1.) Not having to waste money on law enforcement, judicial proceedings, and incarceration. 2.) Potentially collecting taxes from those that sell it. Another interesting way to go with that would be to treat it like alcohol by selling it in a regulated manner as they do in Amsterdam (despite it not being legal). Interestingly, use in Amsterdam is the lowest in Europe despite how easy it is to obtain. Why? Drug dealers do not check for I.D.
I became interested in this topic ever since the state held a committee hearing in Olympia in January of this year. I have done the research and it has changed my mind from disagreeing with legalizing to thinking legalizing is probably the way to go.