This could possibly be the easiest DIY around. Spotted by Jen of The Style Crusader at LFW, get cape-like without going the whole hog by wearing your jacket without your arms in the arm holes. Perfect done with any type of jacket - blazer being a favourite.
Image: The Style Crusader, Tommy Ton and Style.com
Ps. I know I have gone on and on about capes on this blog - but tried one on at Zara a few days ago (camel one with slits in the front for arms) and it was ridiculously impractical, I couldnt get my bag on my shoulder and my arms stuck out in front of me awkwardly.... maybe the jacketcape is really the way of the future?