Playing games? Restocking (both Igloo+Main)? (You can always use http://www.thedailyneopets.com/dailies/ and do their make 80k a day thing.)
you can try restocking legitedly/playing games/getting lucky or main shop autobuy/igloo autobuy/money tree grab
Restocking is the best way to go. If you have a decent internet speed and fast hands you can do it legitimately. The Spooky Food shop is a good place to try. Spagetti and Brains, Spyder on a Stick, Brain Stew, those sort of things sell well on the SW/TP.
I personally pimp out my neopets, i get a handsom return How many neopoints have you gotten? Are you starting a fresh or are you wondering how you can bolster your bank balance?
well.... i just made one and i only have like 4k and its making me kinda angry.... i just use stock market....
Stock market usually doesn't provide a good return until you've amassed 100k+. I'm surprised no one has suggested playing games (include the game of the day, which gives double neopoints), or doing dailies, for quick (and fairly simple) money gain.