Un-require all required fields so you don't have to fill them out.Place this snippet into your functions.php file and then add the gfunrequire=1 parameter to the url of the page your form is on.

wp_gravity_forms_unrequire.php

<?php
/**
 * Gravity Forms Unrequire.
 * Unrequire all required fields so you don't have to fill them out during testing.
 */
class GravityFormsUnrequire {
    var $args = null;
    public function __construct( $args = array() ) {
        extract( wp_parse_args( $args, array(
            'admins_only' => true,
            'require_query_param' => false
        )));

        if( $admins_only && ! current_user_can( 'activate_plugins' ) )
                return;
        if( $require_query_param && ! isset( $_GET['gfunrequire'] ) )
                return;
        add_filter( 'gform_pre_validation', array( $this, 'unrequire_fields' ) );
    }

    function unrequire_fields( $form ) {
        foreach( $form['fields'] as &$field ) {
                $field['isRequired'] = false;
        }
        return $form;
    }
}

new GravityFormsUnrequire();