I'm on the border between INTP/J. Was definitely an INTP as a kid, then have gradually moved towards the J, such that I'd probably test as INTJ if I took it now.
For me, it helped being exposed to people who Got Things Done. My high school was a startup, my teachers were a bunch of go-getter early-20-somethings, and one of the school's founders was an experienced entrepreneur. That started my shift towards the dark side of the force.
Then when I got to college (still very much an INTP), I volunteered to rewrite a major Harry Potter fanfiction archive and couldn't exactly back out without disappointing 100k users or so. I think the experience of pushing through on that and finishing it was a major portion of what led me to believe I could finish other stuff as well.
It also helped that I can now concentrate on stuff I like doing and avoid much of the stuff I hate. I used to always procrastinate on writing papers - now, I just don't have to, because I went into computers. (Ironically, I still sorta write fiction as a hobby, but I'm as unproductive with it as I ever was with my school papers.)
For me, it helped being exposed to people who Got Things Done. My high school was a startup, my teachers were a bunch of go-getter early-20-somethings, and one of the school's founders was an experienced entrepreneur. That started my shift towards the dark side of the force.
Then when I got to college (still very much an INTP), I volunteered to rewrite a major Harry Potter fanfiction archive and couldn't exactly back out without disappointing 100k users or so. I think the experience of pushing through on that and finishing it was a major portion of what led me to believe I could finish other stuff as well.
It also helped that I can now concentrate on stuff I like doing and avoid much of the stuff I hate. I used to always procrastinate on writing papers - now, I just don't have to, because I went into computers. (Ironically, I still sorta write fiction as a hobby, but I'm as unproductive with it as I ever was with my school papers.)