I love actions, and I'm pretty much an action junkie.
When I first discovered actions I hated them. I didn't really understand how they were to work. I knew how to run an action but I felt that they made every picture look bad. So I started to dissect them, and realized...HELLO, this is how it's supposed to be done!
So make sure when you run an action that you change your opacity. Either change it overall to apply to the entire action or you can go into the layers of the action and change each individual element. Sometimes there might be an element in an action like "haze" and I don't want the haze on that picture so I turn it off instead (this can be done by clicking on the eye).
So when using actions make sure that you adjust the different opacity's and layers.
Very rarely will you run an action that is PURE.
Leave me a comment if you have any questions about actions!
Check back tomorrow for another tip!