Well first off I don't think an hour a day to process your inbox is at all excessive. Especially in the beginning. It takes about that amount of time to get all your thoughts and ideas processed. You will get faster but it will still take about that amount o f time because you'll start to have even more ideas. Just use the someday/maybe list or lists (some folks have several of them) to cull what you do.

I would however consolidate those 4 places to get all your papers in one single place. I collect in many places but I dump them all to a single inbox and process there. Trying to process 4 places is much harder.

On the work side I agree with others, take the time to really get totally clear even if it's working early or late for a bit and then try to keep up.

Most businesses are slow between Christmas and New Years, perhaps you can use more time then to clean out the work stuff?