How can I find storage-hungry files in my home?

Using the following commands, you can get a list of items in your home, sorted by size in MB:

gdu -sm ~/.??* ~/* | sort -n | less

If you replace -sm with -sk, the size will be shown in KB.

If you prefer a graphical approach, try: gdu -k ~| xdu. This will take some time to complete, but should result in a graphical window showing what is using up your precious quota space.

If this doesn't convince you, you can try a tool like treesize.