Taxi: "Mt. Vernon traffic, Jabiru Niner Eight Juliet, At the ramp Taxi runway 23 via Bravo"
if you are leaving somewhat runway heading.
Takeoff: "Mt. Vernon traffic, Jabiru Niner Eight Juliet departing runway two three to the southwest"
If I am taking off and going the other way, I would say:
Takeoff: "Mt. Vernon traffic, Jabiru Niner Eight Juliet departing runway two three downwind departure to the northeast"
This lets people know I am going to fly a pattern as I climb and head out on a known pattern leg
5 Miles out:
"Mt. Vernon traffic, Jabiru Niner Eight Juliet 5 miles to the north, will enter 45 degree downwind for two three"
Entering the pattern:
"Mt. Vernon traffic, Jabiru Niner Eight Juliet entering 45 degree downwind for two three, Full stop (or "touch n go")
Downwind:
"Mt. Vernon traffic, Jabiru Niner Eight Juliet is downwind, two three, full stop"
Base:
"Mt. Vernon traffic, Jabiru Niner Eight Juliet turning base, two three full stop"
Final:
"Mt. Vernon traffic, Jabiru Niner Eight Juliet, final, two three, full stop"
Important to not worry about when you make the call. I used to try and make sure I was turning base and calling base at a precise moment. That is fine as you begin to improve multi tasking.
Make the call when you can. If you can make the call when turning final, make the call "Turning final two three" If you need to focus on lining up for the runway and delay the call 10 seconds, then make the call ""Mt. Vernon traffic, Jabiru Niner Eight Juliet, final two three" instead of "Turning final" or even "Mt. Vernon traffic, Jabiru Niner Eight Juliet short final two three"
Don't try to be perfect, just be accurate about where you are when you make the call. If you forget to call downwind for a minute, then make your call:
"Mt. Vernon traffic, Jabiru Niner Eight Juliet midfield downwind two three full stop"