I assume that my data stored online is ...

Interesting. The biggest problem with TrueCrypt is that you have to upload a single file, and then re-upload that file in its entirety every time you change something. I quickly found that isn't such a nice thing.

Other options include Deja Dup (not that I've experimented with it so much) which uses Duplicity and EncFS (with Cryptkeeper). Wait, that assumes you are using Ubuntu or another Debian derivative, though they'll probably also work on every other Linux system.

Finally, the poll itself. If I backup to the Internet, it's encrypted. But that doesn't count data that doesn't originate from my machine (such as email). My old Yahoo email addresses could be data-mined because all the old emails are sitting in plain text. Similarly, other communications stored by third-parties (private messages on forums for example) are probably also vulnerable.

But when it comes to stuff that originates from me, and is only for me, it doesn't leave my computer for the Internet without being encrypted first. (And 'the same way' is probably not correct. I use the built in Ubuntu home dir encryption, but I have to use additional encryption (such as EncFS again) for backup because my home dir is always plain text when viewed by the backup programs. Because I'm logged in to run them.)

And some (at least) quasi-static IP address. And at least some rudimentary web coding ability. And a hole in your firewall and/or router's routing rules. And I'm concerned that I probably omitted or misstated something . . .