If youre a newbie I wouldnt look to short sale stocks in the face of a rally.

There are better short sale opportunities out there than LULU which is a high growth retailer catering to higher income clientele which, despite the recession, are doing just fine (look at COH for a clue how this demographic is doing).

If youre just itching to short something try and find a firm that is not making money, has deteriorating fundamentals (declining YoY sales, high debt, etc), and where the stock is not in an up-trend.