BIG BEAR...
This one is easy to asnwer but hard to perform...
Make him submit an application to the US EMBASSY located in ROXAS BLVD... Then they will schedule some interview...
Make sure that your friend can produce everything on my list...
1.) Bank statement saying that he has $$$ to travel... 1.2M is the best...
2.) Bring statements/Documents stating that your friend has a work here in the philippines and he has been granted a vacation leave from this date to that date...
3.) Bring documents stating and proving that your friend has a family / child here in the philippines and he will be going back here...
4.) Make sure your friend already knows his plans where to stay in US, HOTEL or YOUR PLACE, exact address of the place he is staying, contact number of the place he is staying, contact person in US, address of the contact person, and contact number of the contact person in US...
5.) Make sure your friend can speak english properly... Sometimes it makes a diff...
HOPE THIS HELPS YOUR FRIEND...