Inserting a record using Standard Controller

Visualforce Page:

<apex:page standardController="Payment__c" >
<apex:sectionHeader title="Payment" subtitle="New Payment" help="http://www.google.com" />
<apex:form >
 <apex:pageBlock title="Payment Edit">
 <apex:PageblockSection title="Information" columns="1" collapsible="true">
                 <apex:inputField value="{!Payment__c.Student__c}" />
                 <apex:inputField value="{!Payment__c.Mode_of_Payment__c}"/>
                 <apex:inputField value="{!Payment__c.Amount__c}"/>
                 <apex:inputField value="{!Payment__c.Date_of_Payment__c}"/>
 </apex:PageblockSection>
     <apex:pageBlockButtons >
                 <apex:commandButton value="Save" action="{!save}"/>
                 <apex:commandButton value="Save & New" action="{!quicksave}"/>
                 <apex:commandButton value="Cancel" action="{!cancel}"/>
     </apex:pageBlockButtons>
 </apex:pageBlock>
</apex:form>
</apex:page>