My biggest thing in the gym is sharing the equipment. I know everyone likes to be in their own little world and not talk to anyone in the gym, but I think there's alot of benefit to sharing and switching in with someone. I can't even count the number of times that I've gotten a new idea or technique from chatting with a person while working in with them.
This is even more important if you're in a busy or crowded gym, since we all get done sooner by sharing equipment.
I hate the equipment 'Squatters' (pardon the pun) as well for this reason -when they do 5 sets and sit on the machine in between, monopolizing it for 20 minutes while 5 people pace around giving dirty looks.
Sweat on the machines I don't care too much about... I'm gonna take a shower after anyway.. I just don't put my fingers in my mouth until then. I do bring a towel to wipe my own sweat though
