Hi quitpic1:
I use my arranger for songwriting and creating rough demos of the songs I create. I'd like to tell you this is a fantastic way to make money but it would be a bald-faced lie. The music biz today is so overcrowded there is little room for folks without great financial backing and tremendous talent.
The advent of the internet and illegal downloads turned the music industry into an armed camp and new, unknown, untrusted artists and songwriters are forced to "run the gauntlet" time and time again until a track record is established.
On the other hand, jingles and soundclips might be an easier way to make some chump change via licensing through a music library... but the sea is fraught with rocks and shoals and there are sharks swimming in these waters as well.
If licensing interests you, there are a ton of Music Libraries to explore and possibly work with. Do yourself a favor and read up on the "rules of combat" and tricks of the trade. At one time, I subscribed to the "Music Library Report" and it is an excellent source but alas, no longer provided for free. They have the goods on just about anybody and everybody in the Music Library Business... and there are new ones appearing every day.
Best of luck,
Dave Rice
www.ShowCaseYourMusic.com/DaveRice/