In organizations where you have multiple management groups. And have production environments which need SCOM to be working all the time. Its advisable to have two action accounts in the SCOM environment. When one account's password is near expiry you can switch to another account and change your healthservice to run from that account.
Its a big task to rotate the action accounts on all management groups and this is where my script comes handy. It helps change the default action account on SCOM 2012 and also changes the Data Warehouse Report Deployment Account. The script files are below.
Change the extension to .ps1 after downloading. The usage is given at the top of the scripts.

Om12ActionAccountRotate

Om12ActionAccountpasswordUpdate

Increase SQL server performance by using WIFI(Windows Instant File Initialization)

This is an interesting post I came across by Saleem Hakani. I have not tested it yet.
It promises to reduce the time for
Creating a database
Expand data files for additional growth
Automatic data file growth due to auto-grow settings
Restoring a database, etc.
http://sqlcommunity.com/SQL-ARTICLES/Post/1514/SQL-Server-File-Operations-on-Steroid"

MSI installation package did not run successfully.

At times you find that some msi installer that you ran did not install successfully.
You can enable MSI verbose logging by running below command and view the logs from %temp% folder.
You will have to add the below reg key to the machine you are installing the msi on.
Run this command in the admin prompt to add the key.

reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\Installer /v Logging /t REG_SZ /d voicewarmup /f