My MBP constantly freezes with Lion, what can I do?

Every time I have used my MBP since I've uploaded the Lion software it freezes within minutes!  I've had to restart about 6-9 times just today.
It is really starting to wind me up as I've paid for this "new" software and I expect a good quality service from apple.
Wish I had stayed with SL now!
Any answers would be very much appreciated!

Backup your files. Boot from the Recovery HD - restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
When the main menu appears select Disk Utility and click on the Continue button. Select your startup volume from the sidebar, click on the Erase tab in the DU main menu. Set the format to Mac OS Extended, Journaled, click on the Erase button. When the formatting is completed quit DU and return to the main menu.
Select Reinstall Lion and click on the Continue button to reinstall Lion onto the newly formatted drive. After Lion has been reinstalled you can restore your files from your backup.

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