How can I find space eating files in my home?
There are many ways to get the information you need. Some examples are:
Command line variant 1
With the following command, you get a list of items in your home, sorted by size in MB:
du -sm ~/.??* ~/* | sort -n -r | less
Command line variant 2
Use the ncurses based tool ncdu.
Graphical variant
Use a tool like Disk Usage Analyzer on GNOME or Filelight on KDE.