Here are some pointers about Beat Mixing to keep in mind:
Rearrange the order of songs in your Playlist so that neighboring songs are within about 5 to 10 beats per minute (BPM) of each other. The more similar the BPMs of two overlapping songs are, the less noticeable the tempo changes will be. (While MixMeister 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 songs 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 song with the beginning phrase of the next song, you can make the transition sound more like a single song.
If you want to disable Beat Mixing on the beginning of a song but use it on the end, make the Intro Range 0 (zero) measures long. If you want to disable Beat Mixing at the end of a song but use it at the beginning, make the Outro Range 0 (zero) measures long.