Sorry but you’ve missed main point — you should know what to contribute.
Alex Sinelnikov

Ehh, I disagree. I mean ‘you’ve gotta kiss a few frogs before you find your prince’ — Same thing here, You’ve got to make a few pointless PR’s before you can make a good one. The point of this guide is to help new developers make their pointless PR’s in a place where others are around to help them.