Which approach can best help future implementation projects to be more successful?

[answerhappygod]

An organization recently completed a major system implementation that is a part of a wider modernization effort. Although the implementation was completed, there were many challenges and issues. Which approach can best help future implementation projects to be more successful?

Use new team members for each project to ensure failures are not repeated
Increase funding for future initiatives so the team has more money to deal with unexpected issues
Document and communicate lessons learned to avoid the same mistakes in the future
Automate future implementations as much as possible to avoid human errors