after the job interview it is considered rude to ask when you can expect an answer about the position you applied for.

If you didn't get called within the 3-4 days, you probably didn't get the job.

Calling an employer about their decision is a bad idea. It will make you look desperate.

Writing a thank you note after the job will pretty much guarantee you the job.

Once you get home it is a good idea to write down your observations and questions so that you'll be ready for the next interview.

If you do get called back, it is best not to call them too soon. You don't want to look over eager.

A thank you letter will make a better impression than a thank you email

It's a good idea to send thank you emails to all the people that were involved in the hiring process.

If you don't get called back after the job interview, it's a good idea to keep calling them every 2-3 days until you get an answer.

You must always address the thank you or follow-up email in a formal manner.