A reminder, if you write a full word out two different times, and then tap on them both times, the iPhone will actually add the word to its dictionary. It takes a couple of weeks to store all of your most used words into the dictionary, however, once you have done this typing on your iPhone will be extremely fast.
The last tip has to deal with the capitalization of words. If you want to capitalize the first letter of a word, you simply tap the shift key and then tap the letter you want capitalized, but what happens when you want to capitalize the entire word? This is very easy, and doesn’t require you to tap the shift key before each letter. You will want to go to settings and then tap general after that tap keyboard. From there you will tap “Enable Caps Lock,” and then when you double tap the shift key it will light up blue, and now you will be able to type in all caps.