I have an app that I use for my walk-throughs (though I am thinking about changing apps so if you have a format that you really like, please share!) which allows me to capture a fairly accurate snapshot of what is going on in the classroom according to the standards. What I have discovered, though, is that it isn't the check-list, but rather the free-form comments and the conversations that I have after I have been in a classroom that have the biggest impact.
So in order for me to provide effective feedback and engage in meaningful conversation about teaching practice, I need to pay attention to the little things, not just what is on the check list. If I am in your classroom for 10 minutes one day and don't get back again for almost two weeks, how can I expect to give you meaningful feedback unless I actually talk to you about what came before and after my time in your classroom?
My observation area that I want to work on this year is watching for the little indicators (and big) that tell me the school community is a vibrant, active learning hub where we are all able to engage in and observe learning.