Do you follow any any conventions when programming in PowerShell?

For example, in scripts which are to be maintained long-term do you:

• Use the real cmdlet name or alias?
• Specify the cmdlet parameter name in full or only partially (dir -Recurse versus dir -r)
• When specifying string arguments for cmdlets do you enclose them in quotes (New-Object 'System.Int32' versus New-Object System.Int32
• When writing functions and filters do you specify the types of parameters?
• Do you write cmdlets in the (official) correct case?
• For keywords like BEGIN...PROCESS...END do you write them in uppercase only?

Thanks for any replies.