This is a special technique that is used by hundreds of top DJs.  If you release and sell your CDs, this mix will get higher review scores.  If you're making a mix for your friends, there's a higher chance that they will burn it onto CDs and copy it to their iPods.

This magic "sauce" creates the perfect DJ mix:

1) Your first track must be an instrumental (no vocals)

2) Your second track must have vocals

3) The duration of your first track must be shorter than 2 minutes 30 seconds

4) The duration of your second track must be shorter than 4 minutes

5) All subsequent tracks must be shorter than 5 minutes

This trend appears on many successful DJ CDs.  Try it yourself and hear how good it sounds.