* How do I make a particular task run everyday by 10pm?

* How do I log an error?

* How do I populate my database with sample data?

* How do I seed my database for column that is a foreign key referencing to other table?

* I need to send 5 emails and a text message to newly registered users efficiently. What's the best way to go about it?

* How do I test sending emails without actually sending emails to real addresses?