Contexts and repetetive tasks

Hello,

I have just recently started with GTD and I am starting to get a hang of it. However, I have some questions regarding repetitive tasks (like rehearsing a piano) and doing regular homework.

Right know, my contexts are

@School (the actual, physical place) @phone @reading @Mac @morning (tasks that need to be done at the morning, like remembering things and stuff) @cellar @writing @errands @on hold

I don’t know if I should make more contexts, but I wonder if assigning homework to courses contexts would be a good idea?

Then, a project would be this:

Do german homework Read p. 88 @german Write 4 sentences @german

instead of this, which I’m using right now:

Read p. 88 @reading Write 4 sentences @writing

And assigning ALL reading matters, for business or pleasure, to that context and ALL writing matters, to the @writing context.

I also have one last question concerning projects. Say, my overall goal in Mathematics would be getting a B+. Should I assign all my math homework to this project, or would it be a better idea to make a new project for each and every homework and just archive it in a Mathematics folder?

Some things that needs to be done everyday, like rehearsing the piano - how does one deal with this? When rehearsing, I do exactly the same each and every day - would it be better to make it a habit and use a separate document to keep track on piano-things, like some kind of log to deal with between lessons?

I have learned a lot about GTD and am planning to purchase the book, but I still need some help to manage my trusted system entirely :-)

Btw, I use OmniFocus.

Thanks, HyggeligKar