3. Keep it simple.
Some trainers make their clients lift with a certain rep speed, like three seconds up, one second down. But know this: There's no need to count anything but reps during a set. Simply focus on raising and lowering your weights in a controlled manner, pausing for a one-second count at the top of the lift. Using an arbitrary tempo can lessen tension on your muscles or force you to use varying amounts of weight, slowing your progress. The only way to be sure you're getting stronger is if your loads consistently increase.
4. Maintain a log.
Write down your exercises, sets, reps, and the fate of each workout. Keep track of your best lifts and the most reps you've done with a certain weight on an exercise. Constantly strive to improve those numbers.