Most regular gym attendees will generally find themselves using the same machines, on the same settings week after week, month after month. If this is you, then stop right now!
It is important to offer your body a variety when exercising, as the body quickly gets used to (and adapts) to the stresses you are putting on it. You should aim to switch up your routine every few weeks, perhaps using a different set of machines, or by altering the levels/incline on the cardio machines. By giving your body a fresh challenge, your muscles will have to adapt to fit the new system – thereby changing shape or getting bigger!
Another good reason to change your regular routine is that you don’t want to get bored! If you find yourself doing the same old thing, you are likely to get fed up, then eventually stop doing it altogether. By making a few little tweaks, you can get the maximum results from your hard work.