I highly recommend to Lightroom users that you learn at least a handful of Lightroom shortcuts. They can greatly improve the efficiency of your workflow and make using Lightroom more pleasant.
In any module you can get a close-to-complete list of shortcuts by going to Help>… Module Shortcuts. Because this can be kind of overwhelming, here is a PDF of my favorite shortcuts. After opening the file, right-click on it and choose Save As, to save it to your computer.