After you create and name your action, you want to start "recording" every event you take to make a watermark and later, you can play all of them back in sequence, every time you want to create a watermark, with the click of a button. Click the record button on the bottom of the "Actions" palette. It looks like the record button symbol on your VCR, second from the left.



Ok now Photoshop is recording everything you do for later playback. Select the "Horizontal Text Tool" which is represented by the "T" icon on the toolbar or just press the "T" key to select it. Select a font you wish to use at the top in the info bar and type out a text watermark(your web site URL would be good to use) and position it with the move tool(looks like an arrow or just press V) so it's in the center of the screen, something like in the screen shot below.



Press "Ctrl-T" and drag outside the bounding box that will appear. Drag the mouse and move the text layer you just created Clockwise until the watermark is diagonal like in the screen shot below.



I want to stroke my watermark with a black border. I can do this by going to the "Layer" menu, scrolling down to "Layer Style" and then sliding over and down to "Stroke."



I will change the stroke color by clicking on the "color" field under "Fill Type" and then selecting black and clicking "OK."



Now I see a preview of what my watermark is going to look like stroked with a black border and I like it, so I'm going to click "OK." to close the dialog box and apply the changes.



I think my watermark looks better stroked with a black border