Pre-create my site

How to create my site in SharePoint 2010 by powershell or STSADM?

1. Use the following deprecated STSADM command:
   STSADM -o createsite see also http://technet.microsoft.com/en-us/library/cc262594(office.12).aspx
   (for MySite use SPSPERS#0 for the site template)
2. Or Use the following Powershell script:
   Get-SPWebTemplate
   $template = Get-SPWebTemplate "SPSPERS#0"
   New-SPSite -Url "<URL for the new site collection>" -OwnerAlias "<domain\user>" -Template $templatesee also http://technet.microsoft.com/en-us/library/cc263094.aspx