Well I did run dh_make and got:
ludwig@ubuntu:/media/Downloads/NokiaQtSDK/QtCreator/bin/qexercise-0.1$ dh_make --createorig --single -e maintainer@email.org -c gpl
Maintainer name : Ludwig
Email-Address : maintainer@email.org
Date : Tue, 25 May 2010 17:51:47 +0200
Package Name : qexercise
Version : 0.1
License : gpl3
Using dpatch : no
Using quilt : no
Type of Package : Single
Hit <enter> to confirm:
Skipping copying to qexercise-0.1.orig since qexercise-0.1.orig exists.
Done. Please edit the files in the debian/ subdirectory now. You should also
check that the qexercise Makefiles install into $DESTDIR and not in / .

wich seems ok. And then I did change the rules file... Then what? I did not get any tar.gz file or something. Is that file youll upload later?