WP_Query and Pagination

I am using WP_Query to call posts from a specific category as shown in the code below. How do I add pagination to show the rest of the posts from this category?

<?php

get_header(); ?>

		<?php
		//get 4 recent posts for category 3
		    $args=array(
		      'category__in' => array(3),
		      'showposts'=>4,
		      'caller_get_posts'=>1
		    );
		    $my_query = new WP_Query($args);
		    if( $my_query->have_posts() ) {
		      while ($my_query->have_posts()) : $my_query->the_post(); ?>
<div class="recvidimgborder">
<a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><img src="<?php video_thumbnail(); ?>" class="recvidimg" /></a>
</div>

		       <?php
		      endwhile;
		    } //if ($my_query)
		  wp_reset_query();  // Restore global post data stomped by the_post().
		?>

<div style="clear:both;"></div><br /><br /><?php get_footer(); ?>