There are no rules to co-writing, but if you are thinking about starting up, here are a couple of guidelines you might find helpful:
1. Set the same day and time every week.
2. Decide first how you want to split the royalties (50-50 is good to start, but you can also decide on an alternate percentage if one of you contributes more). It is very important you establish this first.
3. Choose a location that is free of distractions.
4. Even if nothing happens the first time (except the sound of crickets), give it at least a four-week commitment.
5. If you ‘hit a wall’, try calling in a third songwriter.
6. If, after a few times meeting together, you decide it isn’t a good fit, remain friends. Leave the door open for communication in the future, and sharing ideas and contacts.
7. Keep coming to the Alpha & Omega songwriters meetings, to meet new people, and gain fresh perspectives.
Here is some expert advice from Jeff Goldmacher who writes articles for BMI: