Don't let stock photo sites do the brain storming for you
Everyone now knows how to get their hands on beautiful images. The next challenge to make your presentation stand out is to pick the right ones. I prefer to do the chart concept brainstorming myself, rather than relying on a stock image search engine to do it for me. We completed the project. Typing in "success" for "finish" will give you a stream of highly predictable and often cheesy images. "Man in suit raising his arms in victorious joy", "hiqh quality render of a character crossing the finish line". You/the human brain can do better than that. Think of the concept you want to make, all the way to the end. Then, search a highly specific (stock) image that goes with it. Armstrong waiving his hand on the moon, a bunch of empty, used coffee cups on a desk.