- Talk to the person informally (maybe suggest a drink after work)
- Talk to the person formally, setting out what you want him to change
- Arrange a general appraisal interview for each of the team members individually, and use the interview with the problem person to find out what is wrong
- Send an email or letter to him saying that you are not happy and giving him a deadline by which you expect to see improved performance
- Consult your own line manager
- Call the other members of the team together and discuss what you can do
- Ask your manager to transfer him to another team
- Fire him