Designate one of your styles as the Master and base all of your other styles on that one. Then you only have to change the text color in this one.

Alternative #1: if all of your styles already have some custom swatch applied, delete it in the Swatches panel and replace with the new one.

Alternative #2: well I guess it can be scripted as well.

Only for today I'll offer you not one but two ways.

Search for

(d.)[a single space]+

Replace with

$1t

The parentheses mark “Found group #1”, and you can insert this back again in the Replace expression with “$1”. This feature is particularly useful when you need to swap two items around (in Replace you can use something like “$2 $1”) or want to repeat something (simply write “$1 $1 $1 $1” to get five copies of whatever you found).

There is a more advanced way, though: you can search for one or more spaces and then use a Positive Lookbehind to ensure these are preceded by a digit plus a period. The advantage is the expression doesn't “touch” the digits, only (I believe it is an advantage, but for reasons more spiritual rather than practical. It may also run a bit faster.).

Search for

(?<=d.)[a single space]+

Replace with

t

We got our booze / bragging / pool table corner back to ourselves!

But honestly David, excellent idea.

So… no-one noticed I got rid of the long hair & 'stache? (As he inquired while lifting a cold one to his lips.)

I presume you mean you might move “1st paragraph after a heading” and “any next paragraphs” around, and there should always be a “don't indent” style after any sort of heading (*) and “indent” after any “don't indent” OR “indent” style.

I bet Framemaker does this out-of-the-box but in InDesign you'd have to run a script after every major edit.

(*) Typically, one would never indent a plain text paragraph after a heading or some white space, such as at the end of a list.

Use move to move an image.

Can't be done, it needs a script.

As you noticed, ePubs don't care about blank pages. You need to tell at what points you want a page break before exporting:

Creating Two Kinds of Page Breaks in EPUB with CS5.5

or fix it afterwards.

[OT] Why is it people seem to interpret this forum name “The Pub” as “Th ePub”?

Mine, for example :D But that's not for beginners or faint-of-heart, though, as it focuses on the limits of what's possible.

There are a few different flavors of GREP, but the differences are quite obscure and you can in general try any 'normal' GREP expression you find anywhere on the web. David gathered a couple of references:

https://development.creativepro.com/grep

and one of the first mentioned is Peter Kahrel's Shortcut, which especially targets GREP-for-InDesign users and has frequently been called “the best you can buy for a tenner”.