Do. Not. Neglect. English.
Seriously, if it weren't for English I'd be incredibly fucked and having not a glimmer of a hope at any engineering courses.
Don't make fun of the subject, and don't be fooled by its apparent ease, just because you spend a lot of time simply sitting around listening to the teacher. Chances are, he/she is pouring out important ideas that can prove invaluable. And don't ever, ever be fooled by the lack of homework you may get. It pays to keep up to date with the news in all forms - internet, newspaper, tv etc.
Master your persuasive writing skills - it really complements the ability to write high-scoring text responses.
My point is, you can sort of let off the accelerator for other subjects when shit gets intense but for the love of god keep up to date with English.