Package from experimental (Debian)

To install the newest package from experimental distr. you shoud take the following steps.
Installing the newest imagemagick:

1. Type in console:
   echo "Package: imagemagick" >> /etc/apt/preferences
   echo "Pin: release a=experimental" >> /etc/apt/preferences
   echo "Pin-Priority: 900" >> /etc/apt/preferences
2. Add debian mirror to sources.list
   echo "deb http://ftp.pl.debian.org/debian/ experimental main contrib non-free" \
     >> /etc/apt/sources.list
3. Update and install package
   aptitiude update
   aptitiude install imagemagick