Fossil collecting requires a great deal of patience. By researching the area before your visit, you'll hopefully have the tools and equipment required to collect specimens without damaging them.
Be patient and take your time. Remember, the preparation should take place at home. When ever possible remove the specimen along with a little of the surrounding rock for protection.
If you make an important discovery and do not have the correct equipment, or the find is too large. Do not risk destroying the fossil, contact your local museum for help and assistance.