Tip #1: No Pressure
Straight out of the box, you'll notice that your Single Edge is already loaded with a blade — this blade should last you for about 5-7 shaves, but it can last even longer. When the blade starts to feel rough on your skin, tugging and plucking your hair rather than cutting it, it's time to reload a new blade.
The Single Edge uses a very sharp, precise blade that is effective at giving you an extremely close, irritation-free shave. A bad habit learned from multi-blade razors is that pressing down on the blade provides a closer shave.
Your technique with the Single Edge will be the exact opposite. There's no need to press on the razor while using it. Think of shaving your legs or body as sweeping the hair away - allowing the weight of the razor to do all the work for you!
Using the correct angle is also very important for a close shave with your new razor. It's somewhere between 10-15 degrees rotated away from your skin. You'll need to experiment a bit to find the sweet spot.
Once you find it, be sure to maintain the angle of the razor around the curves and contours of your ankles, knees, or other large bone structures. It will take a few shaves to train your muscle memory, but it will become second nature in no time.