Snow, Shane. "The One Conversational Tool That Will Make You Better at Absolutely Everything." Lifehacker. Lifehacker, 20 Dec. 2012. Web. 30 Jan. 2013.
• Confirm time and place
• Dress nicely
• Bring paper, writing utensil and recording device (optional)
Even if you are counting on using a recording device, bring backup.
Take notes by pen/pencil and paper as your primary memory helper for what your interviewee says.
Use your phone recording app as a backup only.
Test your recording device. Download Just Press Record if you choose (and have permission).
Make sure your phone is fully charged.
Make sure you have enough data space to store the file when it is finished. (Thanks, Margot Herried!)
Voice Recorder is a recommended, free app. Evernote will also record voice notes well. VoiceMemos on iPhone will not work for a long interview.
Whatever app you use, test it before your interview.
And make sure that the app actually started recording. At the end, pay attention to which button you are clicking!