Not sure what google already advised, but be sure to
use a land-line handset, not a headset or speakerphone. Also make sure if it's cordless that it's
fully charged, LOL. Nothing more embarrassing than having your interview cut short by low batteries!
Definitely have your
resume printed and in front of you.
Also have the
job requisition (or description) printed and in front of you.
I'm embarrased to say that I totally blew a first round phone interview for a Director job last year by relying on my computer: it crashed moments before the interview, taking my resume and job req with it. I spent critical moments trying to reboot and not focusing on the interview. By the time I regrouped I was hopelessly lost and had no point of reference for the conversation. Horrifying!
Also,
write out some questions before hand if you can. Most interviewers will end by asking if you have questions. It can be hard to think on the fly and ask good questions at the end of an hour of grilling.
Finally, make sure that you are in a controlled environment, ie that your dogs won't bark, your cell phone won't ring, other interuptions that could be derailing to your train of thought.
Good luck to you!!