Writing with a partner puts you in a position where you have to learn compromise and clearly state your thoughts. You and your partner aren't always going to agree on the direction of the assignment, which makes you work it out until you come up with an idea for the paper that works well for the both of you. You also have to convey your ideas in a clear way your partner can understand. This sets you up for real world experience when you have to collaborate with a group of people on a project.
When you write a paper, you can sometimes miss something that makes perfect sense to you, but is confusing to someone else. When a friend writes out a paper with you, he will review your notes. He can ask for clarification on aspects of the paper he finds confusing and he may be able to reword your ideas into something more understandable. Remain polite and understanding as he analyzes your work or you may lose a partner.
Having a partner to help you with your paper can help the time and work pass quickly. You can chat about your interests in your spare time with your partner and you can get to know her better. The important thing is to keep on track instead of letting your partner distract you when you or she should be writing. Be personable, but continue to gently steer the subject back to the task if you notice the two of you are drifting off topic.
Two minds are better than one when it comes to figuring out complex concepts for the paper. Your writing partner may have a surplus of helpful ideas for the paper you didn't even consider. Take some time during the writing process to pick your partner's brain for ideas she has on the subject. You can also discuss the best way to approach the paper and work together to overcome misunderstandings and problems you encounter in the creative process.
A partner can help you relax a little when you are struggling with a deadline. The knowledge that you are not working by yourself can take a lot of stress off your shoulders. You can talk to your partner about your worries for the project and he may be able to help soothe your anxiety. Creating a firm work schedule with your partner and adhering to it can help prevent stressful situations before they have a chance to occur.