I absolutely love Moz.com, I’ve been using their tools & reading articles by Rand and his contributors for years (previously under the name SEOMoz). These visual guides are some of my favourites on their site, and I keep them handy to speed up website reviews, blog posts or marketing plans.
Checklists really help improve efficiency and reduce the chances that you’ll make mistakes or forget something, so you might want to bookmark each post (see original links below).
Features of an optimised web page
From this great Moz post: Visual Guide to Keyword Targeting and On-Page SEO
SEO Web Developer Cheat Sheet
Search Engine Ranking Factors
*This won’t look great in feeds or email, please view the original post.