How can I wipe my hard drive after Lion app store install

I have installed lion through the mac app store, but I'm wanting to wipe my computer because it's REALLY slow and keeps getting the wheel of death... How can I do this after installing lion via the app store?

Recovery partition
http://support.apple.com/kb/HT4718
Here is a link for burning a bootable DVD before you install it. Install package removes it self from the App folder after installtion is complete.
http://reviews.cnet.com/8301-13727_7-20080989-263/how-to-create-an-os-x-lion-ins tallation-disc/?part=rss&tag=feed&subj=MacFixIt
here are a few others for reference:
http://eggfreckles.net/tech/burning-a-lion-boot-disc/
http://subrosasoft.com/blog/2011/07/create-a-bootable-mac-os-x-10-7-lion-flash-d rive/
You can redownload from the app store. Hold option key on purchase and installed.

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How can I wipe my hard drive after Lion app store install

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