Take a look though my "Never Stop Learning" weekly posts & more. You'll be able to see me try out techniques that are new to me, keep my chops up on techniques I've learned through the years, and talk about adjustments I'm making to my workflow to become more efficient/proficient with the Adobe Creative Suite, major focus on Photoshop and Illustrator.
In the Layer Style window you can add multiple Layer Effects and make adjustments to them. Notice in the image above, there are multiple strokes and multiple gradient overlays.
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At the bottom of the column you can use the up and down arrows to move the effect. You can not mix effects. You can only move effects within themselves.
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You can also make these changes directly in the Layers Panel.