Youtube search Athlean X that guy has a ton of killer routines. I recently stopped free weights and start doing more body weight stuff, lot's of pull ups and dips. Seen good results wider back arms are gaining size, esp my triceps,they were all ways lagging behind my biceps. I hardly ever did body weight stuff so it was a shock to my system. What I do is set a timer/watch for 15 minutes and do 3 pull ups/dips, rest 10 seconds, do 3 more. When I cant finish 3 reps I then I bump my rest period to 20 seconds, keep upping your rest time like that until the 15 min is up. This is cluster training, if you didn't know it already, and you can apply this to free weights too. Works great for heavy 3-5 rep range to get a lot of volume with heavy weight without frying your cns. You can add time, reps, and different rest periods to change it up to. Ex, do 3 reps til you can't BUT instead of bumping you rest from 10-20 go 10-15 ect.