well there is always the music theory in practice books, if yur a beginner that''s the place to start. Author is ERic Taylor, that''swhat i used as a wee boy on my violin. If you are making simple background music it is easy. I can compose that sorta stuff in a day. Of course theanother good way is to listen to alot of ingame music done already see what feel they have and with nongame music as well etc