Where are they? What are they? Are they useful?
Read a little here on Cyndi’s list.
Here is a small sample:
There are tons more, some fun, some more like research diaries, and many informative blogs which describe library holdings, research techniques, or history of a certain area.
Google away and find something you like, or start at some of these places:
There are lots more, but that’s a start. Leave time for research!