Bless you brother we share the same misery! I myself have to keep track of:

• An obscene amount of email
• Tons of documentation in various formats
• SW
• And most of all DATA

This is spread over multiple computers like document servers, repositories, archives and my laptop.

On my laptop I typically end up with a directory for each major subject and many subdirectories per subject. The "save-webpage-as" sounds too familiar... If I can’t remember where I put it it’s basically a CTRL-F under Windows (accompanied by an ejaculatory prayer).

I have experimented with tools in the past to manage the mess but the tools (or I) lacked the flexibility needed. I would not dare to recommend one.

In the end I use paper to keep track of things. One A4 with the high priority stuff for the day:

• phone calls to make
• mails to send
• things to fix
• documents to review

I like to think this works for me.