The online courses are nothing to complain about, though. Lots of useful topics with a good theoretical introduction, often solidifying the basics and then followed by well-explained exercises - a good combination between theory and practice. So far, my favorites are the 3D visualization technique courses and site selection courses.
Sometimes, though, it can be difficult to know the best order to take them in, and then I end up doing a more advanced course first or repeating some topics, but that's not such a big problem. After all, repetitio mater studiorum est!
