Can I train in preparing OBs and optimising my observing strategy?

Semi-regularly, the ESO User Support Department runs Users Workshops to introduce new users, and update experienced users, to the most important aspects of preparing proposals, conducting observations and processing data using ESO telescopes and the ESO Science Archive facility, as well as providing demonstrations of tools and even one-to-one and/or group hands-on-sessions.

You can find more details about upcoming workshops and the material of previous workshop at this ESO page.