The Interview

Step 1
Contact them and give them a reason as to why you have emailed them - why them in particular.

Step 2
Arrange a mutual method of connection

Preparation 
Make a list of what you want to achieve

Questions
Follow up questions - 'Why did you?'
Probing questions - 'Do you have examples?'
Specifying questions - 'What did he say?'
Direct questions
Indirect questions
Structuring questions - 'Moving on to...'
Interpreting questions - 'Do you mean that...?'