Team Helios provides tips on effective development practices including design review tickets, focusing on quality over quantity, code reviews, unit testing, and managing builds in the staging environment. Design reviews should involve pair programming to catch edge cases and increase confidence. Quality is more important than completing tickets quickly, except for critical issues. Code reviews by at least one other person are important, and complex work should be reviewed by two people. Unit tests should be written before starting work and run locally to catch errors. No new tickets should be worked on after code freeze, and only the release manager should build in staging.