What legal recourse do I have against a client who is no longer making monthly payments on a retail purchase contract?

Sue in small claims court.

CIVIL LITIGATION

No, you cannot reply to it. The next step is the hearing on the demurrer.

My wife's boss is having an open affair with her in front of our children.

You need a family law attorney.

How much preparation should you do to defend a deposition?

Depends on the type of case, the issues at hand, what your role in the case is, who the opposing attorney is, etc.

What happens after a jury trial?

You need to consult with a criminal defense attorney. This isn't a litigation issue.

Can I be evicted for growing medical marijuana in my apartment, and do I need to inform my landlord if I grow?

This is a gray area. You might want to speak with one of the few attorneys who specialize in medical marijuana law.

File an answer to the complaint

I just found out I'm being sued by a junk debt collector. When I look online I see this. What does it mean?:

It means that you need to answer the complaint or risk getting a default judgment against you.

Is it false advertising or fraud for Teacher to advertise more simulated exams than he gives?

It can arguably be considered fraud and probably is false advertising, but what are your damages here? Not really something worth suing over. You...

Can direct questions be asked on Special Interrogatories?

You can and should ask direct questions.