The "why" posts:  Not running as admin...  Why you shouldn't run
as admin...   "Zero-day" attacks and using limited privilege
Expect to see more malware predating the patches - and how you
can protect yourself. (Or, "Why you shouldn't run as admin, Part
2")  Anti-virus vs. Non-Admin  Should you run as admin only
because your anti-virus wants you to?   The "Running as Admin
Only When Required" Posts:  The easiest way to run as non-admin
This is the really important one for your non-techie friends and
relatives ...  "RunAs" basic (and intermediate) topics  A whole
lot of detail about how to use "RunAs" to run programs under a
different account.  RunAs with Explorer  How to get Windows
Explorer to work with RunAs (and why you might want to).
MakeMeAdmin -- temporary admin for your Limited User account
How to quickly and temporarily give your non-admin account
administrator privileges, without having to log out.
MakeMeAdmin follow-up  MakeMeAdmin script updates, and a
security setting you should change  Priv