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Application cracking - learning
well i dunno about other people, but for app hacking i usually start of by downloading a hex editor and opening up the program with it:p.then do a search for common words, such as 'password' or 'pass'. then if that fails you want to scan over the code somewhat quickly to find something that looks like a possible password. if all else fails, go through the code line by line until you find something interesting;)
it might seem a little weird looking at pages full of hex at first (i know it was for me:p) but eventually you'll know what everything means and you'll understand what it says (kinda like neo, when he can see the code of the matrix;)).