Ensure you pick a password that has 10 or more characters.

Here is why:

"Cracking is far faster than guessing. Using even moderate class hardware, an attacker can generate and test 3,000,000 passwords a second. A cracking attack against all possible 8-character passwords using the 76-character set will, based on that test rate, take 6 years. Of course, many of the passwords will be found in much less time, and any given password will statistically be found in half that time. "

http://www.microsoft.com/technet/community/columns/secmgmt/sm1004.mspx