I was outlining a story I plan on writing and realized it doesn't take up as much space (K) as I would like to and I thought about adding a couple of subplots (one per pov-character=2) but I'm not sure how to go about doing that: How does one think regarding this? I'd like something that puts them to the test, in something that doesn't concern the main plot, which makes them learn stuff, either about themselves or about life, and which also function to develop character. How should I think to come up with something good? How do you "choose" your subplots? Or do they just appear automatically? Could it be the right thing to do in these circumstances or am I adding it for the wrong reasons?