I document it. I first read or find out as much about what the code is supposed to accomplish. After this, I jot down the primary aspects of the program I woul

I document it. I first read or find out as much about what the code is supposed to accomplish. After this, I jot down the primary aspects of the program I would expect to see - decompose main functions. Every ancillary aspect of the code I meet I put under headings that I have written down. I write down aspects I expected but didn't find. Beyond this, you get a panga blade! Good luck