One of my favourite and simple InDesign tips or tricks involves visually moving pages around in a big document without the need to remember page numbers. I put a coloured box on the page I am moving. And a coloured box on the page before where I am re-positioning.
Then in the pages view, I can easily see the two pages and move them. Put the red boxed page after the green boxed page. Simple.
Remove the two boxes on the page itself and I am done.
If you are moving a page to the start or the end of the document or if you can remember the page number, it is quicker to use the standard “Move Pages” dialogue box.