The things you suffer aren’t a direct correlation to living alone, I often suffer the same issues in the evenings and I have never had the luxury of living alone.
The only thing I find that helps is a note pad by the bed and I have a large whiteboard (flame away..) in the dining room which has lists of things I need to do. In effect if it is on the list I can mentally ‘park’ it until I am ready to deal with it. If it is important it gets done quickly, if not a burning issue things can sit on there for months but I will get round to them.
I have lists for home, personal and work. Recently I’ve been taking an afternoon off here and there just to wade through things. Feels good to remove more things from the list than to add.
Write down everything you are worrying about, hit the things you can get sorted quickly and start feeling you are getting back on top of things.
And if workload is an issue there are plenty of great books out there on time management. I refuse to have a crack berry and deal with my mails 3 times a day. 9am, lunch and 5pm for 15 mins. If it is urgent someone will have phoned or found me. Most emails are business spam. I also hate this bloody instant messenger. The key to getting things done is being able to focus without interruptions.