Tutorials about sprite sheets and game optimization:

A beginner's guide to lossless and lossy PNG optimization
A beginner's guide to lossless and lossy PNG optimization

Optimize your PNG files with TexturePacker. Reduce file size and improve performance. Learn how to adjust settings for lossless and lossy optimization.

How to create a sprite sheet
How to create a sprite sheet

This tutorial explains the most used sprite sheet types and how you can easily create a sprite sheet from a single of images. Links to free software included.

Packing normal maps into sprite sheets
Packing normal maps into sprite sheets

Tutorial: Create sprite sheets for your normal mapped sprites.