Some of these have been mentioned but from my first hand experience:
1. Grooming - hair length, mustache length, no beards
2. Grooming - clothes; elders dictated the kind of overcoats to be worn in service; they dictated what kind of suits could be worn on stage at hall and assemblies; bright, colorful ties were frowned on and sometimes outlawed.
3. Movies - R-rated out for pioneers and MSs; even some PG-13 were taboo; MSs were called in on the carpet for owning R-rated movies and removed as MSs if they didn't comply with the "counsel" to get rid of them.
4. Music - During the late 70s, early 80s we were forced to purge our collections of anything considered "debased". Artists included The Beatles; James Taylor; Elton John not to mention heavier rock bands and disco of the era.
5. Concerts - Rock concerts specifically; those that went had to keep it on the down low; those that bragged about going got "counsel" from the elders about "bad associations"
6. Motorcycles - both street and track; dangerous risk taking; interesting side note: dirt bikes seemed okay cause some elders kids had dirt bikes.
7. Cars - as in racing; all motor sports were frowned on and if you pursued recreational (but legal) motorsports then privileges were limited or removed.
8. Playing in a band; as in four or five adult brothers started a classic rock cover band and played in small venues around town. Some over-zealous JWs complained, the elders investigated, the circuit overseer pulled the plug on them. They were forced to disband.
9. Continuing education; anyone who thought of going to college got "counsel" from the elders; local tech school was okay, but out-of-town colleges/universities were cautioned against.
10. Games; we used to get together and play board games and parlor games; some self-righteous sisters complained about some of the games and I got counseled on "worldly entertainment" and was asked to not pursue those pleasures as I was an MS and was to set the example for the other friends.