ENTJs are good at organizing things, and people. Hard-working, reliable, good at coming up with new ideas and new methods for problem solving. Can be charismatic and funny in some situtations, very good to have as a sports coach or group leader as practices/meetings will make the most of the time allotted and be well-organized.
ISTJs are excellent at formulating plans to minimize stress. They also take friendship seriously and fulfill all their friendly duties. It may just be my ISTJ pal, but they seem to have a fantastic sense of humor and don't mind being silly every once in a while.
My ISTJ buddy once packed me lunch and wrote down the carbohydrate contents (I'm diabetic) on a piece of paper unprovoked because she knew I would forget . She also manages to get me out of the house every other weekend or so (and wtf is up with that?! I'm supposed to be the social one!)