Courts balance convenience and justice in forum non conveniens motions by weighing both private interest factors, such as the convenience of parties and witnesses, and public interest factors, like local interest in the case and the burden on the court system. The guiding principles shaping these decisions include access to justice, ensuring the plaintiff has a fair opportunity to litigate in an appropriate forum, and equity, ensuring no party is unduly burdened or denied a remedy. Courts also consider judicial economy, aiming to avoid duplicative litigation and minimize court congestion. Ultimately, courts seek a balance that maintains fairness and ensures efficient resolution without compromising the rights of the parties.