Hate drawing out your sig every time? Here's a tip to fix that problem...
1 Make a new document, 500px X 500px preferably, depends on how big you need it. (don’t worry, you can just resize the brush for small pics anyway)
2 Make a new layer and delete the background layer
3 Get a suitable brush size and draw out your signature.
4 Goto Edit>Define Brush Preset and call it signature. Click OK.
5 It should pop up with the brush immediately, but if it doesn’t, goto the brush preset window and scroll to the bottom, it should be there.
Note- The size you’ve just made it in is the highest it’ll go at that quality, so make sure you make it big. Also, when you click it, it may be too light, so just click over it until it’s dark enough.