Yeah, there's a lot and it all depends on where you're lagging, weak points, etc. I like closegrip bandpresses, especially if you use board because it cuts out the momentum and just kills the lockout. Othere than that, deadpresses rock, speed sets like 3 reps, rack to rack in a second and a half, stuff like that. There are the other stuff that's essential like scalpula retractions but in my opinion, the best "helpers" are deadpress, closegrip bands, military presses, and bentover rows.
JHO