[youtube RwY-qWqol8c] Here is an excellent tutorial on crimping which was featured on Ornamentea. If they have a great archived section of tutorials and how tos as well. If you follow this link you will with the above tutorial as well as excellent images on how to do wrapped loops, double loops and how to close a jumpring.
Bonus: To celebrate their 10th Anniversary – if you spend $20 you can buy this BeadFreak Tee-shirt for just $1.