If you want to distress your fonts then there are a few steps that we can do:

1. Make duplicates of all of the text layers.
2. Merge all of these duplicates together into one layer.
3. If your text is black then hit ctrl+i to invert it to white.
4. Ctrl-click this layer to load it as a selection.
5. At the bottom of the layer stack, click on the "Add Layer Mask" icon (it looks like a white circle within a gray square).
6. Play with all of the various filters. The changes will be made on the mask and not the actual layer so if you don't like the result then delete the mask and try something else. The one I use is Filter-Pixellate-Crystallize=12. Then I repat this but at 6 and 3.
7. If you don't like the way the text looks then try some different fonts...this is why we made duplicates of the originals.