What i do is have my wallet on a dedicated machine that is never used for anything at all!, Encrypted partitions don't hurt. But I guess no on e can every really be truly secure! Perhaps transfer your money to a wallet that is never used online! stored in a couple of External drives. Maybe in gmail, a nice strong password in 7zip is VITAL! Operating system doesn't matter, Linux isn't more secure because it's better but because its not as profitable! If 50%+ of the world was on Ubuntu there would be just as much crap on there too!
Not entirely true. Linux is absolutely more secure by design, and even *if* more than half of the world was using Linux for their desktop machines, it would be considerably harder to write successful hardware for Linux systems than it would be for Windows systems. I do agree however that a wallet stealer would be just as successful on Linux, seeing as your wallet is stored in your /home directory, and is thus accessible freely by anything you run. A "wallet stealer" really isn't anything more than something that emails/uploads a file in your user directory.
If anything, the wallet needs to be encrypted by default (through the client, and not by third-party software, so that you never need to have an unencrypted copy accessible as is the case with Truecrypt etc).
