Go to Window >> Action and make sure Action is checked so that your Actions palette is out.
Find this button: which is right at the bottom of the Actions palette. Click it and name your set whatever you want. The set is just the folder name of the action.
Now find this button: and click it to start making your action. Once you have clicked this whatever you do to your image will be recorded.
When you’re done making your action click this button: to stop it.
And now click on the set you want to save not the action, the set! And then find the little arrow:
Then after clicking it go to Save Actions and name it.
If you want to offer these on your site just make them downloadable and upload them to your FTP account.