Know the legislative process. Identify legislation in its preliminary stages, and follow it through the process. Be aware of changing circumstances and how they affect your issue. Stay in the information mainstream, and be prepared to offer new alternatives, if necessary, in a given situation. Be flexible and consistent with your position.
Negotiation is a big part of successful lobbying.
Deal with those whom you are lobbying in a straightforward, friendly manner. Never knowingly mislead a policy maker. Stick to your own issues, but, whenever possible, cooperate with other organizations working on the same issues. Give credit where credit is due. Then give more.