If you can, you should pick the ones that are most interesting to you. In many cases I think you can even pick ones that are a bit outside the official schedule

If you can, you should pick the ones that are most interesting to you. In many cases I think you can even pick ones that are a bit outside the official schedule, like bioinformatics, scientific computing, computational neuroscience, advanced operations research etc. and still get credits for it. It's worth understanding well what your options are instead of following the official schedule blindly.