How to move document and apps

Plan to sell my current MBP 13, 2.26GHz to my niece and get the MBP 13, 2.4GHz. What's the best way to move my document files and current apps that I have to the new MBP. I have a couple of ideas of my own but would like some opinions on this for confirmation and efficiency. Since they are essentially the same model can I just switch the HDD or is that a no, no?

Thanks.

Use the Migration Assistant or your latest Time Machine backup. When you first turn on the new MBP it will ask you if want to restore from another Mac.
That will copy everything over. Time Machine is probably the best and easiest way.

Another vote for Migration Assistant. Used it a few times. Worked great.

+2 for Migration Assistant.

+3 for Migration Assistant. It works brilliantly!

Thanks everyone. Just ordered the MBP 13, 2.4GHz My niece is getting a good deal on my upgraded MBP 13, 2.26GHz that only had for 8 months for $800