Changing Default Applications

I had a tough time figuring out how to set Adobe Acrobat Reader as
the default application for reading PDF files. Mac OS X had Preview
set by default and I couldn't find a 'Default Application' item in
the help text or any menus.

Solution : Select any PDF file in your Finder. Don't double click on
it and then select 'Get Info' from the File menu. In the 'Open With'
section, select Adobe Acrobat Reader (of course, you need to install
this first). This didn't work for me till I selected Other and then
pointed it to the executable. Then, click the 'Change All' button
which will set Acrobat as the default application. This still didn't
fix it in Firefox, but I'll tackle that later.