struggle

Hi all. Just a couple things to report for this week.
First, I am still struggling with my query letter. I'm still trying, too. For some reason it's difficult for me to condense my big rambly story into a few concise paragraphs. Hmmm. Any words of wisdom from out in the ether?
Second, I have begun my final tidy of my manuscript. Of course, there are constant interruptions and I never get as much done in a day as I would like to, but I am making forward progress, and that's the important part.
Third, I spent some time brainstorming for a series concept a few days ago. And I think I found it. I've scribbled some notes about how the world of my series works, and pondered where to have it take place, and made a list of things to research. What I have not done yet is character sketches and specific story arcs, since I'm still trying to get to know the world I'm creating. Maybe I'll say more here about specifics at some point. But for now, I thought I would ask if anyone has any great input/suggestions/links/etc. about world-building. So, anyone?
Off to start my weekend with some freelancing. Have a good one, everybody!