Thanks... this is great advice. I think people have been saying "focus on one thing at a time" for a long time... in fact, I've been saying it to myself for a long time, too, but I have not really been hearing it. The idea of adding 1 new habit every 30 days is interesting and powerful... the mechanics of it can be kind of weird, though--what if there's something I just want to do a couple of times a week, and it's secondary which day it happens on?
When your problem is not getting things done, it is not secondary what day you do things. Doing things "whenever" is the natural enemy of forming a positive habit. The more concrete your plan (including a timeline), the easier it will be for you to follow it.
This is much harder. You should start with things that are every day, for your first month or two, so you are already doing well and motivated to continue. And even then I would pick the days of the week beforehand, so you're not tempted to put it off through the week.
Personally I have had more success with NEGATIVE 30 day challenges, than positive 30 day challenges, for this very reason. A negative 30 day challenge is when I don't do something every day, for 30 days. One habit might be not drinking any soda for 30 days. Then you might add not eating any fast food or pizza for 30 days.
Once I stopped medicating myself with food and weed, my true emotions surfaced and it became easier to know when I was deceiving myself. For example, when I am goofing off more than I should, I now feel sad and pained (not guilty), and consequently correct my behavior.
I second the idea of not drinking soda for 30 days. That stuff is unhealthy in various ways, and after a couple weeks, you won't miss it. It's a clear easy win. I did this in high school and have not regretted it.
Thanks so much for your help.