Train the enemy to not see you as a target (for adc's)
I play in bronze, and sometimes I notice that if I go a few teamfights without really trying to do flat out as much dps as I can possibly do and instead be really safe and refuse to be killed no matter what, then the enemy stops seeing my character as someone they can kill and they start focusing my tanks. Over time, this allows me to slowly become more and more aggressive, laying down better and better dps.
This works even if it feels like we lost the fights where I didn't dps that much.