Prelim rage is raging at the moment. My pal says prelims are like semi finals (yes, he's a he), you don't win anything, but you can lose. I think he's talking rubbish, I think they're more like dress rehearsals, where you get to see where you stand, what you're doing well and what you've still to work on. Either way, remember they are important, so learn for them, then learn from them.