Forever switching between note taking and presentation view? You have a bluetooth keyboard? If you have a bluetooth external keyboard (and primarily have it paired with your tablet how about pairing it with your phone, using your note taking app (evernote in my case) on the phone and leaving your tablet free to view stuff on. Now why didn't I think of that earlier?
I'm looking at ways in which I can organise with my voice (well I'd prefer that brain implant but will prob need to wait a few more years for that, so in the mean time). This is an interesting smallish workflow.
A photo tool that allows you to remove unwanted objects (things that get in the way) by taking a series of photo's and having the software make the analysis. That could come in very handy.