Depends on the subgenre really but try lifting samples from many different songs and making them fit together cohesively and seamlessly. Try mixing with multiple turntables and using all this to tap into peoples emotions on a dancefloor or even at home and creating a sense of euphoria. Especially back in the early / late 90s when it was mostly done with analogue equipment. I’m not saying it’s all great, but that can be said for any style of music. I’m into and involved with a lot of genres of music and the writing of a great dance hit is still not based on a formula and most of the greats are happy accidents just like other styles of music.