Hate it when you squeeze lemons or oranges into a sauce and get the seeds in the pan? Well, just squeeze the fruit with the cut side up. This allows the juices to run over the sides of the fruit, while keeping the seeds within the peel.
You may think this is a silly tip, but I suggested this to my friend once and she exclaimed "why hadn't I thought of this?" Plus, why dirty another bowl by squeezing the fruit there first, then picking out the seeds. This way you save hassle and dirty dishes!