Being the paranoid, suspicious, and avid privacy nut that I am, I have set about the process of securing my data and my Internet. I'm also working on ways of staying as anonymous as possible in the real world, but that's for a different forum. Before I get to my question, some explanation and overview is in order:
I have, over the past year or so, done my best to safeguard my information as best I know how. I make good use of encryption in the form of Truecrypt triple-layer cascade encrypted volumes with lengthy passwords, I use a firewall and Tor for most of my internet traffic, and all of my known online accounts use twenty-one character, almost completely random passwords which are stored in an encrypted file and managed by a privacy-enhancing firefox plugin, which also clears flash cookies and warns me of privacy concerns on websites I visit. I have a plethora of firefox add-ons installed to protect me online, including a spam and tracking network blocker, a virus scanner, and Foxyproxy (which handles my connection to the Tor network). I also use good passwords on my computer and I've done all I can to prevent unauthorized access.
Based on some research I found online, there are still a few things that I want to do: lock the BIOS with a password, encrypt my entire filesystem, erase all unnecessary e-traces of myself I can get my hands on (I have a feacebook, but I'd like to keep it as a communication tool), and enhance my mobile security (android phone, already encrypted the filesystem and use Tor).
The last four items I'm not entirely sure how to put into action. I need to find a method of encrypting my filesystem without destroying my data, erase as much of my online identity as possible, and keep my phone's data and network connection secure. How should I go about these things?
Also, I have considered setting up a Virtual Private Network to provide a secure connection for my mobile phone's online traffic. I have absolutely no idea how this works in practice, and what benefits it offers over Tor. Based on the info I found online, I was considering using a secured VPN to connect my phone to a home server created from an old Dell I have lying around, which would run the traffic through a firewall, virus-detection software, secure http proxy, and on to the internet, perhaps through Tor (though that seems a bit redundant). that way, any data going over my mobile network would be unreadable by AT&T on it's way to and from the internet. Is that feasible? If so, How would I get that to work?
All help on these subjects is appreciated.