Working on servers : rules, how tos,

Password protecting your pages and folders with .htaccess and .htpasswd
An interesting article on how to protect your web site or only a part of it using some server functions.

WordPress: child theme, hooks, functions +

Source View: twentyten_header_image_height

----
How To Modify WordPress Themes The Smart Way - a great tutorial with 4 pages: a smart child theme (css + functions: add and delete), hooks, functions.php

----

Line break and a paragraph space in Wordpress?

How to add line break and extra spaces? (I was looking for this kind of information, solution for more than... 4 years... Thanks!...Finally.
----

Functions:
Add action in WP official - usage, parameters, hooks
Function Reference Official WP - Functions by category: posts, pages, categories, +++
WordPress theme function files on JustinTadlock.com - how to, what is, a child theme functions file, examples

----

Working with WP Hooks:
WordPress Hooks Database - all hooks, all action hooks, all filter hook, all deprecated/renamed hooks
How to Customize Like a Pro with Thesis Hooks - Hook Commands, examples, remove_action, add_action, Thesis WordPress Theme
Define Your Own WordPress Action Hooks -
http://codex.wordpress.org/Plugin_API#Hook_to_WordPress (official wp hook page)

----

Wordpress Security:

- 11 measures to improve your WP site security

----

WordPress BackUp:

- how to make a WP backup

----

Plugins to explore, to test:
- Formidable forms (Quickly and easily build forms with a simple drag-and-drop interface and in-place editing. An alternative to Contact Form 7...the both plugins have the same developer)

- Display Widgets (Simply hide widgets on specified pages. Adds checkboxes to each widget to either show or hide it on every site page. A kind of... My snippets, or... Widget Logic)

- Breadcrumb Trail for WP (An easy-to-use template tag for showing a breadcrumb menu on your site.)

Resources

Marketing online
PPCro - publicitate online pe motoarele de cautare, despre pay per click: articole, noutati, instrumente;

Web analytics
web-analytics - articole, noutati, instrumente, despre web analytics;

SEO
seo & usability yahoo group - discutii, instrumente;