Try and pick some tracks that have a similar BPM and style... and try and surround bangers with lesser tracks to heighten their effect!

Also you say your a beginner to "non-stop" mixing..... I wasn't aware that there was any other form of mixing! How do you usually mix tracks?

For radio your gonna have to be on point with the new tracks to make sure youv'e got a few of the latest in there... any exclusives are allways a good idea (as long as they are YOUR exclusives and not some other DJ's that you stole) Keep the mixes short and sweet and don't try to pull off anything you don't think you can handle!

Good Luck, DJ High