Here are some pointers about Beat Mixing to keep in mind:
Rearrange the order of tracks in your Playlist so that neighboring tracks are within about 5 to 10 beats per minute (BPM) of each other. The more similar the BPMs of two overlapping tracks are, the less noticeable the tempo changes will be. (While RecordForAll can handle differences in BPM of 20 or more, this mix may not sound very good.)
Beat Mixing works best on tracks that have long rhythmic beginnings and endings and use lots of drums. Dance tracks are often ideal for Beat Mixing thanks to the noticeable drumbeats.
Try lining up musical phrases as the Outro Range and Intro Range where two tracks overlap. (A musical phrase is similar to a sentence in a book. It is a continuous thought that lasts 10-30 seconds. A singer would typically take a breath at the end of a phrase.) By overlapping the ending phrase of one track with the beginning phrase of the next track, you can make the transition sound more like a single track.