Now that I think of it, there is generally little reason to use the word "literally" in its correct sense.
When you say "literally", you are saying that what you are saying is true. And it is usually assumed that what you are saying is true anyway.
For example:
That made me laugh so hard I fell on the floor.
That made me laugh so hard I literally fell on the floor.
They mean the exact same thing.
Also "obviously" usually makes you sound condescending and/or closed-minded and doesn't really add value to the conversation.
For example:
The square root of 16 is 4. - Meaning: The square root of 16 is 4.
The square root of 16, obviously, is 4. - Meaning: The square root of 16 is 4 and if you didn't know that already then you are an idiot.
Or
Barak Obama is the best choice for president of the US - Meaning: I believe that Barak Obama is the best choice for president of the US.
Barak Obama is obviously the best choice for president of the US - Meaning: Barak Obama is the best choice for president of the US and if you don't understand why then you are an idiot.