I think your list is quite good, although I'd not put functional programming on top. OOP is mandatory IMHO and some of the following you might consider adding to your list.

I'd recommend starting with a good course on algorithms and (especially) data structures since one needs a good grasp of this subject for any sizeable programming task. Unfortunately I find this skill lacking even with more "advanced" programmers.

Another nice skill to have for writing reusable code is patterns (Gamma et al.). Thinking in terms of patterns speeds up development and allows for better code maintenance.

Some ideas coming from the Extreme Programming community are also worth familiarizing oneself with (first write a test, then write the code that will be tested; always do regression testing while adding code). I've done a few projects that way and besides being efficient, it was also satisfying.

Just some ideas, -gjb-