[Ninja]

Tithing to lawful Gods and the donation box are the main ways to gain lawful points. DMs can award alignment points should they find your actions to be lawful, chaotic, good or evil. There is no quick and easy way to gain (certain) alignment points because actions have consequences. If you're lawful and don't want chaotic points, then don't do anything chaotic, or get someone else who is a more chaotic person and have them do it away from you (disband from the party) so you're not associated with said person should they be caught or awarded an alignment point you don't want.