What are your indicators?
So what are everyone's indicator exercises relative to their weakpoints? Those variants/supplementals/accessories that when you're hitting PR's, you just know a competition PR is around the corner. Perhaps everyone could get some fresh ideas into their training.
Squat - Oly squat and Front Squat Isoholds - (Slow down out of the hole\tendency to GM - so these tell me where my quads and anti-flexion/thoracic extension are)
Bench - Comp Grip Floor Press (I stall/slow down right above this point in competition)
Dead (Sumo) - Conventional RDL or Sumo Deficit Pull (I'm a T-Rex so I slow down right below my knees) - I especially feel good if I'm hitting PRs after heavy squats because a max Low Bar Squat really taxes my erectors at meets.