TXP Tips in the Admin category:

Customise the Write tab with a Lightbox script

A very helpful tutorial on customising the Write tab for your TXP install with the aid of a Lightbox script.

Create your own Admin theme

How to roll minor changes to the Textpattern UI into your own custom theme.

Increase the textarea sizes in your Admin

A simple way to increase the size of your textarea in your Admin using a little CSS.

Using phpMyAdmin to update your database

How to use phpMyAdmin to perform an update, in this case to change the commenter name.

Theming the Admin interface

How to change the styles for your Textpattern Admin.