LM, Great goals! You really seem to have your act together! Can't imagine myself with the discipline to do it, but I really like the idea of interspersing the organizational projects and the cardmaking. I will be thrilled if I get my stamps from one project cleaned and put away before the next one gets started.
Do you "need" to hand address your envelopes, or can you make up address labels on the computer so that addressing them is less of a hassle?
I just put all the stamps I tried to sell last year but couldn't into a bag destined for donation -- likely to Goodwill. One of my non-creative goals is to reduce my amount of stuff and one of my action items for that goal is to make a trip to Goodwill at least once a month -- preferably twice a week.
Good luck as you continue those things that work for you and as you incorporate the "next steps" you have set for yourself.