So far I'm only on my 6th project so I don't really have a set style yet. Of my projects, the smallest was 5800 stitches, and the largest was my first at over 59000 stitches.
On these projects I use a scroll frame which I hold in my left hand, so to avoid crushing stitches, I start to the right hand side of the plan and complete all the pages that will fit on the frame surface before scrolling to the piece of fabric to the left. However, I usually start on the left hand side of the page of the chart I'm on, at either a top or bottom corner dependant on what has the greatest colour block to make the most progress as rapidly as possible. I try to complete a page of the plan before moving to the next. I do not yet do parking, but will be attempting that later this week if all goes well with other jobs in the house.
In terms of a completed project (in the Stitch-a-long forum called 'Portrait: The Eyes Have it') here's the chart page plan:

I started at the lower left of page 4, then the upper left of page 8, upper left of page 7, lower left page 3 and then scrolled on. After that it was lower left of page 6, lower left page 2 and scrolled on. Here I broke with normal practice and finished the face on page 1, before completing the hair. Then page 5, completed the face first before the rest - I just wanted to see the model's face.
Oh. It may be worth saying, in my current project ('Luis Royo: Uranos Drops' in the SAL forum) fits on the face of the frame & does not need scrolling. I'm not using Aida and plan on experimenting in other ways, so I'm playing safe and locating it in the middle.
Told you; I have no fixed way yet.
Regards,
Richard.
Edited after reference to progress photos showing I started Page 7 at top left, not bottom left