If you're using a multi-blade razor, which seems to be the most popular kind, hold the razor with your index finger extended near the top of the shaft, resting the head flat of the razor against the skin. The handle should be raised at an angle of 30 degrees or so.  If the cartridge is assisted by a spring to hold flat against skin curves, start shaving with the handle raised enough to compress this spring just a little into its range. Drag the razor handle-first across the skin to shave.  Applying pressure is not necessary; pressure or sideways movement can cause cuts. Try to bring the razor as lightly as possible across the surface of your skin. As you practice, you'll be able to set down the razor, pull it across the skin, and raise it up at the end of a stroke in a smooth motion. A rolling razor like a "Headblade" can maintain the proper angle in hard-to-reach areas. You want your blades as clean and uncluttered as possible. Whenever you think there's possible buildup between or underneath your blades, dip and swirl your blades underwater. It's usually a good idea to soften the water by adding soap (this will make the water go scummy, but will help protect the blade from the scratchy minerals that tend to dry on after use). You don't have to actually stretch the skin, but if your skin is loose in any way, it helps to create a flat, firm surface for the razor to cut across.  If you're shaving your underarms, for example, lift your arm as high as you can so that the skin under your arm is pulled tight.  A multi-blade razor with a ridged or, better, rubbery leading edge will help pull skin tight for you right before shaving it. Right beneath the jawline is a problematic area for many men because it is contoured. When you shave this area, lift the skin on your cheek up so that the skin that was right below your jawline is now right above it. Shave with the grain.
أمسك بالشفرة بالطريقة الصحيحة. كل فترة اغمس الماكينة في ماءٍ دافئ لإزالة أي شعيرات بين الشفرات. اسحب جلدك لشده حيثما كان ذلك ممكنًا.