<invalid@example.com> wrote:
>My purpose is to have hard-to-guess and unique passwords on
>all of the different systems in life that ask for passwords.

For each site, choose a random password (your system has a random number
generator, use it). Save these in an encrypted file. Done.

>Here is my plan: I propose going to these webpages to get
>somewhat randomish data:

This "randomish data" is more predictable for an attacker than the output
of your system's random number generator.

>BTW. is there a formula that lets me plug in the length and
>the number of possible characters and tells me how big a brute
>force search would be?

n^k.

--
Kristian Gjøsteen