Here are five simple tricks for APT, the Advanced Packaging Tool used on Debian and Debian-based distributions like Ubuntu.
Read it here
List files which get installed by a package
-L is a handy parameter to dpkg which will show you what files a package will install.
dpkg -L package_name
dpkg -L amarok
Will show all the files which are going to be installed by package amarok. You don't have to be root to run it.