For early-stage PhD students
A few (unsolicited) hints on getting the most out of conferences, how to find them and how you decide which ones to go to. This was originally written for Warwick Ph.D. students in the more recent cohorts, but hopefully this will be useful for others too:

Amanda Agan has a fantastic collection of resources on her website related to writing and presenting your work, as well as advice for preparing referee reports. Check it out here. Ryan Edwards also has a collection of resources relating to giving seminar talks, discussing papers, refereeing, publishing papers, and more (link).