Another technique that often, sadly, works is the old school man-in-the-middle.
I was recently looking at the api of an app on my phone, using ettercap to arp poison my phone and capture traffic on my laptop. Found the api call was over https (fwd secrecy and all looking good), I tried ssl-mitm with a fake cert... no errors in the app, clear text on my laptop. Happy and sad at the same time. :/