You may have enough experience typing to know most of the common keys - the letters, the space bar, enter, and I’ll bet you know that backspace! But you might be uncomfortable with some of the keys you don’t use as frequently. Do you have to slow down and look at the keyboard to type a number or symbol? If you program or work with spreadsheets you will use the symbol keys frequently. If you are a gamer there are probably CTRL, ALT and function keys that you fumble for in the heat of the battle. In fact, most all programs can be used more productively when you know the key combo shortcuts for doing common tasks. Hitting these awkward keys and combos accurately allows you to maintain focus on what you are doing, so make sure you include them in your typing practice.