check out ola.hallengren.com
Problem with this maintenance solution is that it doesn't take backup of new databases. You manually need to add it to the job. Hallengren's solution fixes all these problems.
Ola's stuff addresses a HUGE range of flaws and shortcomings with the SQL Server Maintenance Plans! I recommend it to every one of my clients whether they be mom-and-pop or Fortune 500.
Kevin G. Boles
SQL Server Consultant
SQL MVP 2007-2012
TheSQLGuru on googles mail service