You could go with stuff like Handel arias as piano/organ solo. Simple arrangements of familiar classical tunes sound good on organ and are easy to learn. You could also do hymn improvisations. Learn a hymn, then extemporize on it's various aspects. A lot can be done with text painting.
Speaking of improvisation, I went to a sunday mass at Smokey Mary's in New York, and I have NEVER heard such an incredible improvisation at the organ. He tore the church down. It sounded like a mixture of Widor and Messaien. I was stunned and inspired all at once. Must go back and find out who he is. I had to run that day and couldnt wait around to congratulate him.
Hi, Bob,I've been a church pianist/organist for 20 years, so I know what it's like to have to come up wih stuff every week that won't kill you.I really enjoy the bimonthly subscriptions from Lorenz... they have "The Church Pianist," as well as several that are specifically for organ (you'd have to choose depending on your organ reading/pedaling level). Here is a link if you want to check it out:https://www.lorenz.com/subscription.aspxThe publications contain varying styles, are appropriate to whatever season they are in at the time, and have been a great resource for me. They may not be the most flashy or spectacular pieces, but they are great for general worship services. (No, I don't work for Lorenz!!!)Good luck!Gab
Which mass did you go to? I'd like to visit when I plan a trip to NYC.
400 BABIES
btw, best is not to go to church at all, because you'll melt.