Hi TheShard,
mixcloud is very good for what you are trying to do here as you can see exactly what time a track is coming into the mix (if the uploader has correctly timestamped the mix that is). I can suggest listening to a mix then listening to the individual tracks and see if you can understand what is going on in the actual mix.
I use effects and like to mash up tracks live when I play and I have also learned a great deal from just listening to different djs and their techniques. I have several live recorded mixes on my soundcloud if you want to have a listen.
Also as I mentioned earlier mixcloud is a very useful tool. Have a listen to a dubstep mix I recently recorded http://i.mixcloud.com/C8Arf.
I hope I have been helpful!
