Whenever I have something to mail, this is where I come. Rarely a line, and never one longer than the post office, Moon Valley Postal Center is independently owned and operated with excellent customer service.
I especially like that any address I've mailed to before is in their system. I just give them the recipient's name and bada boom: there it is!
Most recently, my friend left her sun glasses case while visiting. I cruised in with the case and said, "What's the least expensive way to mail this without it being ruined on the way?" The guy behind the counter popped them in a box with some peanuts and away they went!
Mon Valley Postal makes sending stuff easy peasy!
(They're located on the north facing end of the strip mall, just around the corner from Blockbuster.)