How to cut the tracks of a stripboard
There are specific tools that are designed to cut holes in this material, which is either called "stripboard" or "veroboard".  These tools are basically a drill bit in a moulded handle made of plastic or wood and look something like this:



(photo from here)

Because it is basically a drill bit you could use any high speed steel drill bit.  There are some good instruction at Instructables that show how to cut neat holes.  However if you plan on using stripboard often then it is worth buying a tool with a handle, they are quite inexpensive.