Target Audience interview research

Before conducting my Interview on several people for further research for my final products I decided to look it up on google. I was searching the types of questions to ask and how to approach the interview.
Here are the  questions I found most useful to ask;

• Demographics - Are they male or female? what age group? 
• Psychographics - What hobbies do they have? How do they spend their free time? 
• Do they read magazines? 
• How much do they spend? 
• what do you expect to see on a magazine?
• Do you use websites?
•  what for? 
• Do you shop online?
• what do you expect to see on a website?
• Do you notice billboards
• What do you like to see on a billboard?

I also found tips for conducting an interview

• stay relaxed 
• make your source feel relaxed 
• be comfortable 
• have questions prepared 
• note down answers correctly 
• be patient