Shrink log files
- Log into Microsoft SQL Server Management Studio
 - Right click on your database
 - Select Properties
 - Click on Options
 - Change the recovery model to Simple
 - Click OK
 - Right click on the database
 - Select Tasks > Shrink > Database
 - Click OK
 - Right click on the database
 - Select Properties
 - Click on Options
 - Change the recovery model to Full
 - Click OK
 
Reset sa password
From command prompt
osql -L
Copy full name of SQL Server and type:
OSQL -S <insert_servername_here> -E
Execute the following query:
sp_password NULL, '<insert_new_password_here>', 'sa'
GO
From SQL Management Studio
- Open SSMS management console. This is usually under Start -> All Programs -> Microsoft SQL Server 2005 -> SQL Server Management Studio Express.
 - Connect to your instance of SQL Server via Windows Authentication.
 - Once open, navigate to Logins object under Security. Once expanded, right-click on the SA user, and choose Properties.
 - Enter desired password in front of Password and Confirm Password field and click OK.
 
Using SQL Password Recovery Tool
- Run the SQL Password Recovery program and then click Open to load the master .mdf file.
 - Select SA user name to reset the forgotten SA password, or select any other user name which you forgot the password. Click Change Password to reset password.
 - Enter the new password and click OK.
 
When You Have SA Disabled
- Start SQL server as single user using -m flag via command line.
 
sqlcmd -m
- Run as Administrator
 - On the Server Roles page, select sysadmin and reset password.
 
Set RAM limits to internal SBS database
- Open SQL Server Management Studio
 - Connect to server name
 
\.pipemssql$microsoft##sseesqlquery
- Right click root node
 - Click Properties
 - Click Memory
 - Change the value of Maximum server memory (in MB)
 
Error: SQL Server does not exist or access denied.
- Can’t telnet to port 1433, can to other ports
 - TCP/IP and named pipes enabled
 - Services properly authenticated and started/restarted
 - Firewall disabled or exceptions given to 1433 inbound
 
What tripped me up was that I was working with a non-default instance (original one was disabled). Apparently, the non-default instance gets a random port generated for it. Also, the port doesn’t seem to show itself anywhere in the SQL management tools.
The port was found here:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL11.SQLEXPRESS\MSSQLServer\SuperSocketNetLib\Tcp\IPAll