One of the best ways to make your bag more functional and totally customized to your needs, is to add the number and size of pockets that are just right for you.  Whatever the pattern dictates for pockets can be altered.  If you’re adding more pockets, you’ll just need a little more fabric.  I have had as many as eight pockets in one of my larger bags.  Think about sizes and shapes appropriate for the following:

• Cell Phone
• Keys
• Sunglasses/regular glasses
• Pen/Pencil
• Coins
• Water Bottle