Some games are so fun that playing them is its own reward. Other games are just a way of getting neopoints. This guide is about the second kind. I assume that you want to find games that give you a lot of Neopoints with as little time and effort as possible.
Other guides have just given lists of games that give easy points. However, some of these games are removed by Neopets after a while because they are primarily advertisements for a limited time (e.g., while a movie is playing in theaters). To replace games that are removed, you will have to look through the lists of games, and it helps to know a couple of telltale signs of easy points.
Look for photographs instead of cartoon graphics. Movie promotions will use photo stills from the movie. A TV show promoted on Neopets will often be about a group of kids, so there will be photos of the kids.
Look for the words “personality quiz” or “trivia.” A personality quiz will typically tell you which character of a movie or show you most resemble. A trivia game will test you on facts about the advertised product. A personality quiz is faster and easier because there are no right or wrong answers, but they usually give fewer points (often 200 per play). Trivia games take a few plays to master, but they tend to give more points (up to 600 per play).
Look for words or graphics that refer to movies or TV shows. The more aware you are of movies, TV, and music that appeals to kids and younger teens, the more easily you will spot the easy promotional games. – sushiboat