Travis Alber at Publishers Weekly gives 5 tips. Here’s one:

2. Keep it Simple

Partnering with a startup needs to be simple. Hopefully you have a little wiggle room to experiment in your organization without a 50 page legal document. Worried about risk? Limit your risk by limiting the content and access you’re giving a startup.

Simple also means using the product the startup has built. Don’t tweak too much. Use it, learn something, and maybe there’s a way to improve on the relationship in the future, at which point you can outline what features you’d like to see.