Well, this is not related to London, but...

Since I came here, I needed to open new accounts a lot
such as bank or mobile.
The problem is always password or PIN.
I can't remember which one was for what,
and I got locked out from the online banking a few days ago,
and from my mobile as well.

For online banking, I need ID number and PIN as well as
"memorable word", and have to type them all the time to log in.
But they set lots of rules such as "within *** words" or
type of characters or no use of the same characters.
Once you start thinking like "Oh what should I choose...
err...I can't use this...not this one either...",
it's already far away from "memorable".
OK, perhaps I was a bit stupid not to have written down even hint,
but it was so embarrassing to call to the bank
saying "Sorry, I couldn't memorise the memorable word".

In the case of mobile, I had no idea how to change the PIN,
so I left it as it was, but forgot about it and entered some
different PIN. The result was locked out again.
The start guide says I need to read the handset manual
to change the PIN, but the manual only explains what happens
if I forget PIN. What can I do???

Anyway, I solved the both case, but still I need to memorise
student ID, ID for library, etc etc...feeling dizzy by numbers and alphabets!
Please anyone, give me a high spec memory in my brain.