Still puzzling the title? I suppose the full of it would be: How to Tell Who WON’T Make It in Writing (and How Not to Be That Writer). This is more of an attitude check then actual craftspeak. Your attitude toward your writing, plus the way you handle criticism, and so on, will have a significant impact on your eventual writing success, or lack thereof. So, take a look at this rundown and see if any of these cloud of dooms are hovering over your head.
For instance, are you unable to accept that some of your writing might not actually be all that great, and that you need to work on improving it? Can you never accept criticism (constructive or otherwise) without requiring a few months time off just to let your wounded, fragile soul recover from the blow?
Also, Holly Lisle has a treasure-trove of other articles on the general writing craft, worldbuilding (some of the best I’ve read) and lots of other inspiring and sobering conversations on the nature of writing as a full-time career, which is what she has managed to shape for herself with no little blood, sweat, and the trampling of her nay-sayers. I hope to link a few other of her more core pieces, especially when I put up a post on worldbuilding, which is something she delves into so deep she needs scuba tanks to survive.
I see that smile.