Dan Frakes at Mac­world helps you get your Mac ready for the forth­com­ing Moun­tain Lion release, slated for some­time in July:

As with Lion (OS X 10.7) last year, Apple is adver­tis­ing Moun­tain Lion as dead-​​simple to install. But as with every major upgrade to OS X, there are a few things you can do before Moun­tain Lion is released to ensure that your Mac is ready for the new release.