Last week, I wrote about why writing for the web is made easier by writing in Markdown.
I wrote about Markdown for two reasons: 1) I really believe its very useful for the type of people that read this blog; and 2) it's an easy recommendation because I use it every day.
Since that post was (thankfully) helpful to some of you, I decided to rinse and repeat. Reaching back into my bag of regular recommendations, we have this excellent cheat sheet by LunaMetrics. Eventually these will change (Facebook is slowing starting to change their Page layout, as is Twitter), but until then, this is your one stop shop for using images on social media.
UPDATED: Twitter just recently released their new profile page design. Here's what you need to know: profile pictures are 400 x 400 and the big banner is 1500 x 500. Rock on.
Image by the LunaMetrics blog.