Indesign files are getting larger and larger, can there be scripts optimized?

And always "Place" (link) graphic content rather than pasting or embedding. Even a large quantity of native vector art can dramatically increase the file size over creating the same art in Illustrator and linking it.

What do you mean by large? What is the size of a file you consider too large?

Beyond a Save As to reduce file size, have the habit of pre-sizing your graphics to 300ppi before placing them into InDesign. Ideally, pre-plan your rez-and-size in Photoshop (color management, too) and thereafter place into InDesign. The habit of placing 72ppi pixel graphics straight into InDesign will certainly swell the file size, since ID creates a 72ppi preview image internally for each pixel graphic placed.

You can also check how many pages are saved as previews and at which size to further reduce file size. This setting can be found in the Preferences under “File Handling”.

First, get in the habit of doing a 'Save As' to a new file name at least once a day. This will purge unneeded data (mostly undo info) and reduce the file size, as well as give you a useful chain of backups.

You might also occasionally export to IDML, then open that and save to a new INDD file name. That purges more data and can fix file glitches.

No script needed. 🙂