First we find an image basis we want to use.
Then we cut out the part we want.
Then, in this case, we add a lightsaber blade.
I do this by making a simple square with a round end selection, then "feathering" that out by 5 or 10 pixels to blur it. Then putting white in it.
Then duplicate that and blur it out further and color the duplicate whatever color you want (green in this case). Then merge the two layers together for a single blade layer.
Duplicate the blade layer and rotate it to form another blade to complete the staff.
To make glow text, I first make the text I want - then duplicate it (not shown).
Then I blur the duplicate to make something like this:
Then I put the original text on top of it.
This text was done the same way - but I just copy and pasted it from a previous signature to save time.
I also threw a drop shadow behind the character.
Finally, we throw a background image behind all the layers we have. A cave in this case.
And here's how the layers ended up looking.