Pretty much always impulsive, though sometimes I could "feel" the urges building up, so would "decide" to cut sooner rather than later (because putting it off always seems to make it worse when I finally do it.) So I guess sometimes it's planned (sorta) but that impulsive urge comes first...the planning has to do with how much willpower I happen to have.

I am basically always sober. There has been once or twice when I had a drink before it, but I've never been drunk.