Hi honey,
This is a really valid point. My inability to focus is why I don't post, respond, or PM that much. I just can't focus enough to get my thoughts out.
I, too, forget to work on my depression. Especially if I'm having a better day. When I'm in crisis, the only thing I think about is getting back on track, but when I'm doing okay, I think about everything else until I find myself in crisis again.
I'm trying right now to create routines for myself. Actually, to compartmentalize my focus. It's HARD. I'm trying to devote my time in increments to the priorities in my life--school, exercise, housecleaning, admin/errands, relaxation, etc. It's hard to tell anyone how difficult that is. When I'm supposed to be concentrating on one thing, my mind seems to always be elsewhere.
I keep reminding myself that life is progressive/cumulative. My world doesn't begin and end in one moment, here and now. It builds on each thing I do.
In meditation, one learns to gently guide oneself back to the present. All of us have experienced our minds wandering. It's so natural. But we GENTLY guide ourselves back to the thought at hand. (I say this as much for me as I do for you

)
As far as recovery is concerned...everything that you think about can be related to your recovery. I'm trying to think in those terms as well. When dealing with your noisy neighbor, can you think of how you can deal with it AND aid in your recovery? When dealing with mounting bills, can you think of how you can deal with them AND aid in your recovery? I don't know whether you're Borderline, but the DBT (Dialectical Behavior Therapy) skills help a lot in this respect. Dealing with these issues builds mastery...gives you a sense of doing things (instead of just feeling things) and that makes a HUGE difference.
How do you stay focused? By GENTLY guiding yourself back when you get unfocused. Maybe you can make a list of what's on you mind...everything that's on your mind...and then prioritize it. If that project feels too big and your mind goes elsewhere, GENTLY guide it back. Don't beat yourself up. So many people who appear to be "normal" are not; they are just gentler on themselves and utilize these skills that come more naturally to them than they come to us.
Good luck, honey!