When Immigration Matters

I am a recent graduate F1 student, and I want to immigrate to the US. I have a master degree in business administration.

I wonder what type of employment immigration I should process. What are the differences between a H-1B and a EB visa (overview, processing time, procedure, requirements, advantages...)? Is there any salary base restrictions for employers to employ and sponsor me?

What should I include for a I-601 letter as a brother in law who is a citizen?