Advice on adding partnership programs

Looking for some advice on how to gain more partnerships programs started at a technology company. I.e partners selling on your behalf and recommending your product to their customers.

This might be company’s who help build applications and therefore want to use a technology that worked well in the past or they have very specific needs where your technology is perfect.

What are the common commercial modles?

What is the common referral fee?

How do they work best?

Any other advice on what is a stressful model for partnerships?