I have just had a revelation that has knocked my socks off. I just realized that if I click on one of my designated tags, I pull up every blog that I have tagged that way. I don't know what I thought they did (if they didn't do this)...I think I thought the tags were there so that others could search (say in Google or Bing) and find this particular piece of text.
I clikced on "arts based research" and everything I tagged in this way became one seemless set of blogs. I suddenly realized the breadth of posts that I had seen as fitting this tag. It was far more than the set of items that I had associated with visual memos.
I found this extremely help as a visual aid, particularly as posts mount up and I lose track of earlier items (with my limited brain power). As is common with technology--serrendipity is all!