Yeah its always a really hard to transition into a song with 2 totally different bpms.
A few tricks are:
Hip Hop Slam – its all about timing on this one…at the end of a phrase…which is usually 32 beats drop the 2nd track and slam your crossfader over and just go into the next song….its all about timing though…usually just before a drop or the beginning of a build of the 1st song you just cut to the 2nd track…make sure the 2nd track is lined up on the 1 so you still maintain proper phrasing.
Mixing – This one is really tricky sometimes it works and sometimes it doesnt. It works best when you start off with the build of the 2nd track, The majority of songs have 2 timing sounds…which is usually the percussion (snap) and the kick drum…kicks are of course on the low eq and percussion is on the high eq. By cutting both the highs and lows out you are left with usually a melody…something that doesnt really go to a certian beat. By slowly bringing the 2nd track in with just your mids @ 12′ with your channel fader at around 1/2 way, slowly raising the volume of your 2nd track and slowly bringing up your highs and mids, then when its about 16 beats before the drop of the 2nd track adjust the highs and lows of the first so you the dominate tempo sounds are from the 2nd track…wait for the drop cut to the 2nd song and your off.
Double time – set your 2nd track to be 1/2 or double of the original song…mix in and then when the drop of the 2nd song hits…pull the tempo fader to the original bpm of the 2nd song and cut.
There are lots of variations of these but these are the 3 i usually use.