Often when having SQL Express Editions installation I would like to schedule and execute stored procedures. Using Express editions you cannot make use of the SQL Agent, but you can run them manually using a batch file and using the SQLCMD.EXE file as below

SQLCMD /Q "USE mydb; EXEC mystoredprocedure"

This will use the mydb that you specify and run the mystoredprocedure. You can also use the > filename.txt to make the job log.