Citizens with more money and education vote more often. For example, according to the FEC, up to three-fourths of college graduates vote, compared to less than a third of people without college degrees. But it is the civic duty of everyone to vote, not just the rich and educated. In California, you have 29 days to vote. After the last day to register to vote passes, official ballots can be cast in the Elections Department.
Voters can also request an absentee ballot.
Originally absentee ballots were designed for voters who would be out of town on Election Day. Now, anyone can request an absentee ballot. More people do this for the convenience absentee ballots provide. Here in California there is one polling place for every 1,000 people. This is added convince, there is always a polling site close to where you live, usually within walking distance.