"hI SWEETIE, HOW IS EVERYTHING GOING TODAY?"
My response? WHY ARE YOU SHOUTING???
When we type messages, utilizing capital letters is the equivalent to shouting. And shouting isn't very nice. Be sure to stay away from writing in all caps unless completely necessary. Special occasions are worth shouting about. For example, it is okay to write "HAPPY BIRTHDAY!!!" Don't abuse the exclamation marks though. There's really never a reason to use more than three.
Did you notice the letter "h" is lowercase above? A lot of times when you accidentally hit the "caps lock" key on your keyboard, you don't even notice that you are now automatically typing in all capital letters. It is on the very left of your keyboard, above shift. It's pretty easy to accidentally hit the caps lock key and activate the feature. Don't worry, just hit it once more and YOU WON'T BE SHOUTING ANY LONGER!