These links (far from a complete list) will help get you started. It's one way to contribute directly to live ongoing science.
Make sure that your PC has proper cooling and ventilation. In particular cleaning out dust from the heat sinks with canned air is a good idea. Also beware that some discount GPU cards may not be able to tolerate the additional load in which case it's better to only enable CPU processing. And if you have overclocked your GPU and/or CPU, it might be good to lower the settings a bit to make sure it can tolerate 24/7 high load. The project sends each "work unit" out to three clients. You can guess how that works out for accuracy in the recombined result.