Open Virtual DJ. A shortcut for the program is located in the Start Menu's Program Files.
Load the tracks that will be mixed into the library by clicking the "+" button and locating the tracks on the hard drive. Once the tracks are loaded into the library, drag the tracks that will be mixed into the two decks.
Begin to lay the first track. Keep the cross fader 100 percent on the first track. Press "play" on the second track and use the headphones to listen to the second song. Use the rhythm window at the top to look at the EQ of both songs. This can help in beat matching.
Click on "Adjust BPM Values." Click "Edit" to slow down or speed up the beat of each track independently. This can also be done by using the "Tempo Tool Bar."
Practice beat matching. Beat matching can be tricky to master, but learning to use the tools in Virtual DJ and practicing will help in matching beats. A keen ear is required to be a skillful DJ.