Things to check before sending your board out to be manufactured.

• ERC
• DRC with the rules from the board house. Silver Circuits Rules
• Miter Corners?
• Spell check silk screen
• Did you move the silk screen to the proper layer?
• Tented via's?
• Mill layer or dimension layer must have contiguous lines, and set to 0 width
• Via's under batteries?
• All Power/GND's connected?
• Random Squares?
• BatchPCB only uses dimension layer
• Larger pads for strength, ease of soldering
• Vector fonts