1. Open a photo you wish to apply an action.
2. Open an Actions panel (you’ll find it under main Window menu).
3. Load action you wish to apply (click on the panel menu and select Load Actions). You can get the actions here: http://sandrastipan.com/shop/product-category/photoshop-actions/
4. Now when you’ll se the action in the panel, select it (you have to select an action that is within the action set, not the whole action set) and click Play.
You’re all done! An action is applied to your photo. If you are using my actions, they are all layered so you can modify it as you wish.