Elections: Citizens elect the city council members. The citizens can choose people whose ideas they agree with. Then these people make laws for the city.
Speaking at meetings: Citizens are usually allowed to speak at city council meetings. At the meetings, citizens can share their opinions with people who makelaws.
Calling and writing letters: Citizens can also send their opinions and ideas to their elected leaders. Citizens can reach their city council members via phone, mail, oremail.
Direct voting: Many cities also allow citizens to vote on some laws before they are passed. Some of these cities also allow citizens to suggest new laws and vote on them.