UST has lots of books to guide you through your research process and answer your questions:
What makes a good interview question?
What is grounded theory exactly?
When is it best to use snowball sampling?
How can you entice folks to engage themselves with you?
How should you compensate participants?
What are good ethical practices?
Atkinson, Paul (1992). Understanding ethnographic texts. Newbury Park, CA: Sage
from the publisher's website: "...the first "how to" book of its kind. He provides basic, yet significant, lessons for ethnographers going about the business of writing up their findings".