I think that Steven R. Covey said something to the effect that humans can really only do one task at a time really well. Some are able to simultaneously do several tasks OK. But in order to achieve true excellence you need to find focus in what you are doing. Clearing your head is one of the first steps you need to complete if you are to find concentration of thought and action.
So how do you solve the dilemma of wanting to do more than one thing at a time. Find maybe the top two or three thing that are on your list and allocate the majority of your time to each one individually. Hopefully with your new found focus it will enable you to move quickly down the list making headway picking off each item one by one.
One of the reason that I started this blog was to clear my head. So I don't think that you will find one unifying theme. You might see trends due to a higher level of interest in one thing over another. However I really want this blog to be my "catch all" or funnel. Do I really expect anyone beside maybe one or two family members and maybe a few friend to read this? No. Honestly this is more a person exercise but the chance that someone might actually read this will force me to put a little more effort in my spewing of thoughts to the written word.
Seven Habits of Highly Effective People