I run a Mac so my comments might be off the mark but generally maximum your RAM and minimizes services on the laptop you don't need. For instance on my Mac Mini I disable Spotlight and energy savings such as screen saver.
Are you using iTunes as your player and file manager? If so you might consider a third party playback software used with iTunes ( on the Mac side there are several like Pure Music and Amarra.
Are you using iTunes as your player and file manager? If so you might consider a third party playback software used with iTunes ( on the Mac side there are several like Pure Music and Amarra.