Liqueur-making, principles and techniques

So you wanna try and brew some of your own eh?  Come on down to this fine site and learn some of the various recipes for your own Liqueurs.  BarNone doesn't list many of these but Gunther has quite a few and he seems to have tried a bunch of techniques himself.  If you have some knowledge in homemade liqueurs I'm sure he wouldn't mind hearing about your experiences.