Best tutorials for Magento

BASIC LEVEL

The Basics Of Creating A Magento Module

Custom Block Development in Magento

Magento Custom Module Development

This was the original series of articles I wrote on the functionality I thought a PHP developer coming to Magento would want to know about. While some of the details have changed (these were the CE 1.3/CE 1.4 days), working through these articles is still the best way to come up to speed on the system.

1. The Magento Config
2. Magento Controller Dispatch and Hello World
3. Layouts, Blocks and Templates and Addendum
4. Magento Models and ORM Basics
5. Magento Setup Resources
6. Magento Advanced ORM: Entity Attribute Value; Part 1
7. Custom Magento System Configuration
8. In Depth Magento System Configuration
9. Varien Data Collections
10. Magento System Overrides and Upgradability
11. Magento Default System Configuration Values

Creating Magento Adminhtml Grids, simplified

Magento’s “Quote/Order/Invoice” workflow

Importing Products with the ImportExport Interface

Create your own Magento log files with Mage::log()

eBook: Magento Extension Developer’s Guide. 

Overwriting and deactivating Observers in Magento

Magento Basics, Request Flow, Standards and Best Practices

JUNIOR LEVEL

ADDING CUSTOM PRODUCT ATTRIBUTE TO QUOTE AND ORDER ITEMS IN MAGENTO

Magento Order Status and Magento Order State

Magento Catalog Price Rules

Magento Onepage Checkout – Add New Step

How to create Magento payment module

Setting default values based on GeoIP data

How does magento full page cache work

MAGENTO USER GUIDE

eBook: Magento Features List

THEME BASIC

Tutorial: Introduction to Magento Theme Development

Creating Custom Layout Handles

Demystifying Magento’s Layout XML – Part 1

Digging Deeper Into Magento’s Layout XML – Part 2

Magento Sort By Newest Products Made Easy

Add Your Own Widget Templates To Widget Options

Magento Custom Widget

PHP ADVANCE

Secure Your Forms With Form Keys

DEVELOPMENT TOOLS

I suggest the following excellent tools

• Magento Check Sheet 1.
• Magento Check Sheet 2.
• PHPStorm IDE
• Magicento Magento IDE Plugin
• modman Module Manager to keep each modules source separated
• n98-magerun Generic Magento CLI tool
• git and github for Version Management
• composer and magento-composer-installer for Dependency Management
• xdebug PHP Debugger
• PHPUnit Unit and Integration Testing
• Magento Profiler http://www.fabrizio-branca.de/magento-profiler.html

And Great sources and tuts here:

http://alanstorm.com/category/magento
http://inchoo.net/
http://magebase.com/category/magento-tutorials/
http://fishpig.co.uk/blog/