I'm always experimenting in the gym. Hell, I sometimes think if I didn't spend so much time trying new ways to train that I'd be a lot further ahead, physique-wise.
When getting set to do an exercise, there are only two real decisions you need to make, “How Many Reps Should I Do?” and “How Close to Failure Should I Go?” Here’s your guide.
The general rule is, if you can lift 200 pounds for 8 reps, then you should be able to do 250 pounds for one rep. Too bad that rule doesn't work for the vast majority of people. Here's a better way.