^ is a good way to do it, would it be fair to point out that for that to really rock you would have had to take care to line up phrases as well as beats? i like swapping bass too, drop one as you raise the other. also like drop ins: where you're incoming tune is matched but instead of fading it up you just fade up on the snare every other bar then fade back down, then after a few bars of that fade up for more of the beat, it's kind of like a build up effect. cant explain it v well but its a common technique so google drop-ins. can work real well on b-lines + melodies too. also on outro getting a snare sound for scratching out with an echo can be good if the transition doesnt occur on a break. WHat caps said about listening to the songs end is so important. If you know your songs inside out you can do so much more with them and this includes knowing how they end. You may find that doing nothign excpet that basic fade at the right place is the best mix available. for instacne if you know two songs and phrase them so the one tunes intro ends just as the outgoing tunes break begins then you get build of intro to tune 2, then tune 1 bass cuts and breaks without you doing anything and your tune 2 should hvae just kicked off after it;s intro. It isnt always about what you do to it, it;s about where you start it and where they fall after that. in other words - know your tunes and let them do the work for you. finally there are occasionally little outro vox comments or other noises which can be scratched out nicely wihtout needing to know much about scratching, just rock the platter back and forth as you are fading out vol.