I’m sure there is a more elegant solution but this is what I do.
When I build my template, I make sure every paragraph has the correct style set for it. Then I change the colour of the text that will need to be edited in each incarnation of that document. I make sure the colour is an obvious contrast with the basic text so that I don’t miss any – for instance, if the basic text colour for that paragraph style is black, then I change the needing-to-be-edited text to red. BUT (this is important) I do NOT make the different coloured text a character style. That means it causes the little plus sign at the end of the name of the paragraph style in the p-styles pallet.
When I am creating a new document from the template, I go through and make the editorial changes necessary and, as I complete each paragraph, I simply click on the little second-from-the-left icon at the foot of the p-style pallet. This changes the entire paragraph back to the correct colour.
A quick visual skim through the document when I have finished the editing should show up any remaining text in the wrong colour.