An important step is to get out and talk to prospective publishers and business partners. Do they participate in affiliate programs already? What has the yield been in terms of performance? What are the typical revshares that ad networks are taking? What are typical conversion rates? What would be the incentive for publishers and business partners to promote your products and services?
Consumers are your customers. They are the ones who see the affiliate link/form and then complete the action (click, submit, etc.). It is important to really understand the mindset of these people. For Affiliate Marketing, this is especially important, as how you portray these users will dictate much of your decision making around design of your affiliate system. If you glaze over this step, your program (and marketing as a whole) will likely be ineffective!
Work as a team from the same Mailjet account. Separate your activities using sub-accounts, invite an unlimited number of users, and control what they can do by defining their roles and advanced permissions. Each team member will be able to work independently, within a well-defined scope of abilities. Maximize your efficiency, maintain full control.