Make sure the photos are from the chest up, tightly cropped, with a white or cream background.
Convert them into black and white in iPhoto and make any adjustments as needed (brighten up, etc). Make all the photos as consistent as possible in terms of position of the person, background, how bright or dark they are, and how cropped. Make sure they are all different expressions!
Save your top sixteen as a contact sheet in iPhoto as a PDF.
To create a contact sheet-
Select the top photos you are going to use by pressing command + click.
File > print
Select contact sheet- use 4 columns across, 4 down
Print > PDF (select on the bottom left hand side as a drop down menu- do not print a sheet!)
Save > Save as PDF
Save in the folder 04-20-2017 Expressions folder
Open up in Photoshop and save as a JPEG so you can put it on your blog
Crop your image to 8" x 8" 300 resolution
Create a new blog post called "Mood Portraits"
Put your image of the contact sheet