Overhead squats with barbell are a good exercise but I would say with kettlebells would be even better because there's less wrist strain and more balancing that comes into play with two unwieldy balls of iron overhead.
Chins/pullup of all kinds today. 2- 8kg bells 3 x 3, one 8kg bell 3 x 3, bodyweight 2 sets of 3 reps and 3 sets of 2 reps = 30.
I'll do these twice a week of various set and reps schemes and PUMP up the VOLUME.
-Joe