I knew this problem all to well, I went through it a number of times and I know other writers have as well. Interestingly enough in my Writing Class we came across an exercise that really helped me and I'm going to share it here with all of you. It's nothing special but it really helped me and I hope it does the same for all of you.
She walked out onto the porch.
Not a lot there besides the activity. Now here's the first layer I added to the scene.
She walked barefoot out onto the wooden deck of the porch.
Okay now we have a little more to go on. Barefoot, eh. That opens up possibilities for the scene. Maybe she just got up, or she likes to go around with no shoes on. Or perhaps she's wearing just a bikini and is going to sunbathe. I decided to start being more specific and added another layer to the action.
Having poured a cup of tea, Cassandra made her way barefoot out onto the wooden deck of the porch, to enjoy the morning air.
Now I've gotten more a of setting going. But I still wanted to add a little more to make things feel real and alive. Like a typical day for just about anyone. So I added one more layer...
Having poured her morning cup of tea, Cassandra carried it out of the kitchen, walked barefoot of the soft carpet of the living room and out onto the hard wooden deck of the porch. She always enjoyed the morning air here at the beach. A gentle cool breeze was just coming off the ocean.
All of a sudden I had an action along with a nicely detailed setting. I didn't overdo the description of the rooms or the porch, but I gave enough for the reader to insert their own imagery. Too much detail can sometimes bog down the reader and bore them to tears. I like to give them enough to build upon without taking away the flow of the overall story. One does not have to get bogged down describing just how soft the carpet fibers were or the colors it contained, unless of course it will be significant to the scene. Say if the person was suddenly stabbed or shot and the contrast of their blood to the carpet's coloring is important.
Layering is a great exercise to play with sometimes. This scene was just for my class homework, but now I plan on using it in my novel. So if you have some writer's block or are having trouble figuring out where to go with an action, play around with Layering. You may surprise yourself.