I’m totally guilty of trolling the internet for images of my characters. I’ve written here before that James McAvoy is the inspiration for Theo Walker. I find inspiration for a lot of my characters this way and I find it helps me keep their features straight throughout the story. I have a basic image in my head of what this character looks like, maybe ethnicity or general features or hair and eye color, and I search the internet, most often stock image sites for a person who looks like what I’m imagining. I print the photo and stick it on my character card.
I’m also guilty of employing this little trick with settings. I keep cards for important places in my novels with information like business hours, addresses, cross streets, anything that might be important details to keep consistent throughout the story. In the mystery novel I’m rewriting, one shop acts as a character. I had a local shop in mind when I created the one in the novel, so I went to the website of the local place and found photos of the interior. I printed them and stuck them to my “character” card for the shop.
Sometimes when I’m writing, all I have to do is flip through these character and setting cards for inspiration to strike.