don't leave ...; don't do ... in advance
僕だったら、それはやめておくな。
If I were you, I'd steer clear of that.
窓をあけておくな。
Don't leave the window open.
子供を好きかってにさせておくな。
Don’t just let your child do whatever they want.
水を出しっぱなしにしておくな。
Don't leave the water running.