Here I cite some really good and legal free resources.
Unspash if a good first place to look for free images.
Other good places to look for free images
If you need a very specific photo, let’s say a photo of Dieppe harbour, then search for it at Shutterstock.com: when you find the photo that you want, then click on the photo, then click on the “Download a preview” icon to download the photograph. While you are still previewing your work, use the photo with the “Shutterstock” watermark; when your design is approved for use, then buy the full resolution un-watermarked image from Shutterstock. It costs just €40 for 5 images, and less if you buy in bulk.
Sending large files
One often needs to send somebody very large computer files. For this I use Wetransfer.com. It’s easy to use and free for sending up to 2GB, and there is an audit trail in as much as you get confirmation when the file has been downloaded.
For sending even larger files, Fromsmash is an alternative to Wetransfer.
To send large file a little more elegantly, you can use your Adobe cloud storage. Each file has a link, which you can get from opening your cloud storage files on the web. Just email the link.
For generating lots of dummy text, I often use Blind-Text-Generator. But note that InDesign can automatically generate dummy (Latin) text into a text block: to do this go » Type » Fill with placeholder text.
When seeking inspiration when starting a new visual identity (logo, banding et al) project, I visit the BrandNew website. Then click on Browse and choose the industry that interests — and look around.