Get out of the habit of using just your index fingers on the keyboard. Keyboards are set out in an order that makes it simple to type a full range of words, and now that ergonomic keyboards have been invented, it makes it even easier.
Place your fingers along the middle row of letters starting with your right pinkie finger on the colon key and your left pinkie finger on the A key. Use each corresponding finger to strike the keys above and below. For example, your left pinkie finger can hit the Q, A, and Z keys. T, G, and B are an extra row for the left hand and Y, H, and N for the right hand. The pinkie fingers also work all the extra keys like Caps Lock, Tab, and so forth, and either pinkie finger can work the Shift keys. The thumbs work the space bar.
Strike the key without moving your hands excessively over the keyboard. You should be able to reach every key from the one basic position. Starting with your pinkie fingers, use these fingers to type the keys on the outer edges of the keyboard. Ideally you should not look at the keys as you type, but for a quick and easy way to type you can glance down occasionally.
Cover the keys so that you cannot see them. This is easy to do with most computer desks these days. Slide the keyboard drawer into the desk so that it is under the writing surface of the desk, thus obscuring the keys. Practice like this daily, and before you know it, the location of the keys will become second nature to you, and you won't even need to look down.