You haven't provided much to go on Sally such as where you are coming from, what you want to see, what sort of accommodation, etc so I'm going to assume you are somewhat adventurous.
Come via Singapore if that is what interests you and that's what you want. But you could add more to it by, say, arriving in Thailand (depending on the time of the year). Travelling overland (by train is better than by bus) through South Thailand, down through Malaysia to KL then by bus, train or plane to Singapore. You could probably pick up a good travel deal while in Thailand. When you hit Bangkok, go straight to Kao Sahn Road where most travellers hang out.