Using Plug-ins (the easy way) http://code.tutsplus.com/tutorials/moving-wordpress-using-plugins-to-move-your-site–cms-22774 Or, without plug-ins… http://premium.wpmudev.org/blog/how-to-safely-move-wordpress/
Or watch these videos from Prof. Nassie
First this one…
xcloner from Brandastic on Vimeo.
Then this one…
clonenow from Brandastic on Vimeo.