Flat Slip Stitch join for joining granny squares. Like the solid granny square? I've also pinned "Solid Granny Square pattern and how to FSS flat slip stitch join".
100 Crochet Symbols and how it looks after crocheting. Words are in Spanish and it is a Jpeg, so it cannot be translated.
Step-by-step photo how-to for working the crochet star stitch. You'll sometimes find this stitch called a marguerite or a spiked cluster.