What is an easy way to lay carpet without hiring a carpet contractor?

I have the padding and the carpet a room. I put the right way. Is there an easy way to do this. I have to put strips of carpet direction around the outside of the room. How can I get to stay in place?

You should also use one of those things (I do not know what they are called), but is placed on the edge of the carpet and kick with his knee. It extends the carpet so no bumps and hills in it.

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