Processing interview vocals, recommended steps, sequences and best practices

Probably best to pick up a book like http://www.amazon.com/Mixing-Audio-Second-Concepts-Practices/dp/0240522222/... because there is so much mixed information online.

http://audio.tutsplus.com/ isn't a bad resource either.

Generally, when looking at a dialog track, I do the following:
-- Look at the general structure. Is there a lot of noise or a little noise, are there steep peaks in volume or does the speaker use even diction and volume, and so on.

-- If the audio is really chewed up (audio is close to the noise floor) I'll normalize the peaks to zero so I have some working room for noise removal, compression and re-normalization.

--Depending on how heavy you process, do noise reduction, eq, multiband compression, and then reverb. There are no hard and fast rules but it's a signal chain I like. I prefer to do everything that affects volume heavily before compression... you'll also find people who like to compress the signal during recording (mostly in a controlled studio setting).