WordPress query_posts() alternatives

It is not advised to use Query_post() since it will run a lot of background operations relying on the WP_Query, and WordPress will load your main query before the template files in your index.php file. Use the following instead:
When you need to have multiple loops in a page, use WP_Query object.
To modify your main look, use the pre_get_posts filter
If you need to modify the main WP loop use the pre_get_posts filter
If you don’t need a loop and just want to get a post