522433 Optimize Magento

I need to optimize a magento installation. Full access to a VPS server. Current speeds: Save product - 28 seconds (goal: <5 sec) Move category - 70 seconds (goal: <5 sec) In your bid, please write your own thoughts on these goals. You must be VERY experienced in Magento tuning. Your job is to optimize these areas: - General server tuning - Optimize components like apache, mysql, php - MYSQL [login to view URL] and look at the db structure/integrity - PHP Configuration plus .htaccess, [login to view URL] file - Cache Filesystem - APC? - All aspects of running Magento faster on the server. Current components are: Magento 1.5.1.0 Linux 2.6.18-028stab092.1 Web server: Apache/2.2.3 (Red Hat) PHP Version: 5.2.17 Plesk/Virtuozzo Database Version: 5.0.86-log