Strip down my Linux Lite

[vladimirm]

I would like to strip down my Linux lite. I need to run only few programs : firefox browser, lamp server, and owncloud. I do not need any other program and would like to uninstall them all, even if they do not use resources. I am not sure from all those packages witch ones are critical and witch ones are not. Can somebody help me create a list of ALL packages i can remove. Thank you.