So you know which fork is for salad and which is for your main meal. Guys, you know to open doors for women. And you never let a thank you card sit unwritten. But do you know proper gym etiquette?

Even if you're a gym etiquette dummy, never fear. Dummies.com has tips for mastering gym etiquette. For example:

• Don't rest on weight equipment between sets. The equipment is for everyone, and your little break could be holding someone else up.
  
• Manage your own sweat. Bring a towel with you and wipe off equipment when you're done. It's just plain nasty to go to a machine and find someone's sweat waiting for you.
  
• Use the lockers. So great, you have a gym bag. But please don't tote it around from machine to machine. Stow it in a locker ... that's what they're for.
  

For more tips on gym etiquette, see the full article on Dummies.com.