Funny you should ask, I'm going to go do that right now. Not enough wind to downwind, and too much to cruise, so I'm going to go get my ass kicked for a few hours and get comfortable on the Blackfish in adverse wind.
Move forward, clean up your stroke, feather the paddle in recovery (good idea to do that anytime) and extend your reach. You want the board to weathervane, generally, that is to have more of the exposed rail behind you than in front, so the wind will keep the board pointing into the wind. Extending your reach moves your effective center of rotation forward even if you can't comfortably more far enough forward to do that.
For quartering wind, you're usually better off tacking--alternating directly into the wind, and then taking the wind on the rear quarter. It's a lot of work keeping the nose pointed at an angle into the wind.