In response to a few requests, here is a design rules (DRC)  file (OSHPark.zip) I created  when ordering boards from  OSH Park. To load them unzip the file and in Layout program, select Route- Load Rules.  Note that the numbers are based on a somewhat limited information available. (For example I do not have data on the maximum hole size) The settings are as follows:

Minimum trace, drill size and annular ring

Just a standard 6/6 with 15 mils from the board edges