Early Retirement Extreme Forums

http://www.humanmetrics.com/cgi-win/JTypes2.asp
This is a test you can take to tell if your an INTJ,
Make your selections and then click "score it" at the bottom of the page.
I tried to be honest and was a strong INTJ. Post your rating if you want.

INTJ.

INFJ - though I also get INFP regularly (I'm not a very strong J/P)

ESFP... should I worry because I'm not INTJ?!?

All the way INTJ.

INTJ
Not extremely strong in the TJ

INFJ, but pretty weak N and J. In the last few weeks I have variously scored, INTP, ISTP and INTJ on the same test! Multiple personalities?

Not sure how outright accurate the test is. Things like "Do you go to the center of the room or stay by a wall?" To me that is either/or and neither/nor. I like being by doors if I am not wearing my M1911A1 in concealed carry! (just kidding)
"Do you feel uncomfortable in crowds?" Who doesn't?
"Do you do things your way or read the book first?" Both.
"Do you keep your desk/workbench neat"? Yeah, when I am not using it.
Some of the questions are variables.

INTJ - a better method is to use the test for a rough indication and then use the type descriptions to narrow down the result. Note that the test only describes a preference. This means that an INTJ can display, say, ISTJ behavior in certain circumstances, etc.
I'd also recommend Reiss's book on normal personalities.

Intj, but certainly not science-interested. Yet a recommended profession for my kind of intj is librarian. And that is my dream profession, aside from lying in bed and reading for 13 hours straight.

INTJ

Another INTJ.

INTJ (very weak T). Wow.

INFP.
Usually I'm INTP. (which fits me better)
I like this test that has a third answer (inbetween) for every question:

http://kisa.ca/personality

INTJ on this one.

Test + profiles --> INTP

Still INTP here.

INFJ
Rob

I suggest a book on personality types because as noted above sometimes the questions in these tests are confusing. I liked Tieger's Do What You Are.
If I remember correctly, you figure out your two middle letters. Then, investigate the last letter of the combination. And, the first letter -- E or I -- is pretty obvious.
It is interesting to read the descriptions, identifying your type and then identifying coworkers or friends. I found this book from Penelope Trunk.

@rePete - Identify NT, NF, SP, or SJ first. The reason, I think, is that N is an internal focus and it therefore matters how you arrange what you think: T or F. S is an external focus and it therefore matters how you arrange what you do: J or P.