In recent Mac OS versions folders have Cover Flow viewing option: you can see previews of all files in the folder as an enlarged icon or slide.
You can quickly insert images from Cover Flow view to your iWork documents.
- Find the image you want to add to your iWork/Pages project by flicking through the slides;
- Click on it and drag to the open iWork document;
- When the cursor turns into a green button with white cross, let go. The image will plop into your document where you hover the arrow-cursor.
This drag-and-drop shortcut saves a lot of time when you want to find and select an image in a folder. Remember to name folders with key words that allow you to find folders themselves via Spotlight!