How can I view my posts in ascending order by number of views

Use the following snippet to track post views on your wordpress blog. The first thing you want to do is add this snippet to the functions.php of your wordpress theme. Follow step 1. and step 2. to track and display the number of views for each post. Credits to the author here on this post

http://wpsnipp.com/index.php/cache/track-post-views-without-a-plugin-using-post-meta/

function getPostViews($postID){
$count_key = 'post_views_count';
$count = get_post_meta($postID, $count_key, true);
if($count==''){
    delete_post_meta($postID, $count_key);
    add_post_meta($postID, $count_key, '0');
    return "0 View";
}
return $count.' Views';
}
function setPostViews($postID) {
$count_key = 'post_views_count';
$count = get_post_meta($postID, $count_key, true);
if($count==''){
    $count = 0;
    delete_post_meta($postID, $count_key);
    add_post_meta($postID, $count_key, '0');
}else{
    $count++;
    update_post_meta($postID, $count_key, $count);
}
}
// Remove issues with prefetching adding extra views
remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);