1. Go for the bounty runes ASAP. Ward as soon as possible to not get ganked early. Runes spawn every 2 minutes.
2. Be focused on harassing the enemy and denying your creeps. Be sure to stack and pull as necessary.
3. Keep your team informed about rune times. Alt-click the clock to display the time. Watch the map, and make sure your team is aware of anything that is happening.
4. Keep a vision advantage as much as possible. Vision will give your team the gank advantage, and deward will disadvantage enemies