Ok I'll contribute.
*disclaimer* I don't smoke weed. I mean I have plenty of times, but it's less than 5 times a year total at this point.
With that said, I would make weed legal. It's absurd how much money is wasted on a plant that makes people peaceful. I would make weed legal, and I would greatly increase the penalties for alcohol related crimes and charges. Alcohol causes so much damage and I think the penalties for it need to be way harsher for actual change to be effected.