Now that you're ready to shoot, it's time to think about the multiple takes you'll need for each scene. Not only is it good to get back-up material in case sound is off in one take, but if you change shooting positions and shoot the content you can edit in different angles to keep the footage lively (see the attached video for an example of this).
You'll also likely need multiple takes to get your actors relaxed. It's often great to get them laughing or joking around right before you start the interview, so they start with a smile.
And rather than getting your actors to memorize the script, try asking questions to get more natural responses.
Finally, it can be great for both b-roll and interviews to get people at work in context at the office, factory floor, etc. These candid moments will help set the stage for the sit-down interview portions.