Try cold showers in the morning.
Whatever routine you decide to use for your "main lifts, " just use calisthenics or bodyweight exercises for your assistance work.
So after bench press, do inverted rows, pushups with your feet elevated and leg raises. Pick a challenging number, like 85 or 100. Then run through those exercises in as few sets, with as little rest as possible. Structure the work however you like, to challenge yourself.
You could go 10 pushups, no rest 10 inverted rows,no rest 10 hanging leg raises, brief rest, then repeat 10 times. Over the course of a couple weeks, try to get the 100 reps in 4 "sets" of 25 "reps" each.
The moves are light and easy, so there is no reason not to push the pace.
Pushups, dips, chinups/Pullups, inverted rows. Use different trips and hand positions.
Back raises, Glute/ham raises, lunges, step ups.
Sit ups, Hanging Leg Raises, flutter kicks, spread eagle situps