The first step is to play defensively. Build a strategy that doesn't require many horizontal shots, if possible, and keep shooting the ball up the playfield (the slingshots will add PLENTY of horizontal movement). Another trick is to backhand certain shots along the edges, where possible, which keeps horizontal movement (and ball speed) down. You can take some of the kick out of the slingshots by nudging toward the slingshot just before the hit, but I haven't seen anyone play this too effectively (might work with a super absent tilt bob).

Slamming the ball back into play from the outside wall of the outlane is the toughest outlane save. Saving off the post is easier (either move the machine toward the offending outlane to guide the ball into the inlane, or try to use the post as a bumper to knock the ball back in, usually by pushing the machine forward).

Positioning yourself so that you are ready to either to nudge toward the inlane (for a save off the wall) or toward the outlane (to put the ball back in the inlane) is probably important.