What is your strategy to find a high-quality plugin that solves your problem? I hate re-inventing the wheel, but I also hate wading through dozens of vague plugins descriptions that don't tell me whether the features I need are included, without deprecated methods or PHP or even security errors.
Do you have tips to get more out of the plugin repository? I made this question community wiki, so you can give one tip per answer and let the community vote the best to the top.