The most important thing I have learned is to not be afraid to try new things on the spot. Now granted you should not bite off more than you can chew but if you have a moment of intuition for a cool transition don’t be afraid to try it. If it works you feel awesome and the people go wild and if it doesn’t make the best of it. The time the bad transition occupies is such a small amount of times in the scope of the event that people wont notice. As DJs we forget that the average listener isn’t nearly as critical of what we do as we are and that they don’t always notice our technical mistakes.