HELP with Buttons

Does any really sweet person have time to give me some advice on how to make a button??? Whether you know of a helpful site, can explain it to me your self, or just have a little tip, I would be grateful. I've learned today how to make"stuff" on Photoshop 6, but I don't know how to make a button for people to link back to my page, or that will take them to a specific post, etc.

HELP, PLEASE!!!!

Bless your soul if you're willing to take on the task of helping me! Thank you thank you in advance!