Save a little time by fast-tracking through podcast intro chatter and cutting off movie credits in iTunes by using the custom Start and Stop times on your songs and videos. Macworld explains that you can right-click on the item in question, and choose Get Info. In the Options tab, check off Start Time or Stop Time to set it. (Use this same technique to create a perfectly timed interval training iTunes playlist for your next trip to the gym or the track.) If you convert the item to another file format, only the snippet will go into the new file.