What is your plan for using multiple cloud storage services?

There are plenty cloud storage (some of them free) options out there, how do you sort your files/uses among them?

I use Google Drive for email, android stuff, docs, google music, photos, and now as a Evernote alternative. I was thinking of using Dropbox for ebooks, screenshot sharing, what else?

Splice is good for audio production

iCloud for Apple

OneCloud for Microsoft

GitHub for software development

What are other services that can be used?

Also for those who have a school Google account with unlimited storage, how do you separate it from your personal one?