First of all - I'm so sorry for a possibly late reply ;w; but here goes the answer!
Easy answer:
I am lurking on the internet, I am looking at films, video clips, pictures etc. on any given searching engine/website.
More specific answer:
I am checking regular Google results
This site for specific body parts: (x)
These guys are legendary at this point (x)
Pinterest but mostly for gathering the "vibes" of an artwork
if nothing I find online suits my needs - I just use my phone and do a photo of myself or my surroundings
And when it comes to commissions - I am often provided with specific poses, clothes or sceneries by the commissioners :)