Step 2 : Go to Image>Adjustments>Shadow/Highlights
Step 3 : This dialogue box opens. These are the default settings shown. Check the Show More Options.
Step 4 : The full settings are now visible. The settings shown are the default ones. Let us have a look at the photo with the default settings.
Step 5 : Move all the sliders to zero.
The shadows have reappeared.
Step 6 : I have changed the Shadows to 20% instead of the default 50 %, while leaving the Tonal Width and Radius to 50 % and 30 pixels.
The Photo looks much better. The first lesson is therefore first to experiment with Shadows, Tonal Width and Radius.
Step 7 : Now I have changed the settings for Highlights. I have dragged the Amount slider to 30 % instead of leaving it at the default zero. The sky has become more blue. I have increased the Tonal Width to 60 % and increased the Radius to 60 pixel.
Step 8 : In Adjustments, I have increased the Color Correction to +40 from the deafult and increased the Midtone Contrast +5. You will be able to see the changes as you drag the sliders in the three sections one by one. There is no hard and fast rule for the settings. First give the default settings, then finetune them gradually.
This is how my finished image looks. If you are using the same image, you will get the same result. Remember that each image will require different settings. Give the tweaks in the three sections, one by one. And, you will get dramatic results. That is all.
Other Photoshop tutorials are here.