history: A time I really felt I had made an achievement was when I was promoted to a Team Leader at work. When I was promoted to Team Leader at work_comma_ I really felt like all my hard work had paid off_comma_ to some extent_comma_ and I gave myself a little pat on the back. You must have really proud of yourself. Its good to acknowledge your own achievements from time to time.
current: Yes, and it can be difficult at times to move up at places, especially when there are many other long timers there!
next: I agree, which is why getting into that position can be so gratifying. Hopefully you maintain that level of hard work that got you there.