If youre looking for a guide to tell you to do the freebies and play games, read one of the other neopoints guide on PPT, which ALL seem to be the same. Hope you like my guide, I tried to make it as different as possible from the other guides.
Easiest Way [I Know]
There are some items that can be used more than once such as omelettes. Some items are worth more after you use them once e.g. two dubloon coin costs about 3980 np to be precise, when you spend it on something worth one dubloon at the Golden Dubloon [a restaurant located in Krawk Island] you get one dubloon coin change, and a one dubloon coin is worth about 4500np [last time I checked], see where Im going with this? Another type of item similar to this are 1/3rds of pizzas, eat one piece and they usually end up selling for quite a bit more.