Recently, I've started recording some of the pieces that I'm trying to polish up, just using my phone. I have been greatly surprised at how awful it sounds first and second time around. I suddenly hear things that i wasn't even aware that i was doing, like inner voices that are lost, phrases that are choppy, etc. I thought i was playing it well before i started recording myself. Then all the details became blindingly obvious.
Anyone else use their phone regularly to record and critique yourself? Give it a try! It's a bit time consuming, but i haven't found anything else that will expedite progress faster during my practice time than being my own adjudicator.
Eric