Don't give up!
I know the snowballing thing is pretty bad right now, but when you just flat out give up and start playing sloppy because, "we'll lose anyways they got First blood" Then you cripple the team and you cause the snowballing to become even more of an issue. Don't give up. Play defensive, farm only and avoid getting ganked, ward up, do what you can to avoid getting tower dived.
Do what you can, don't just suicide into the enemy team because you want the match to FF for the next one.
This happens so often in my matches and it just ruins matches.
The snowball meta in my opinion ruins the excitement of a back and forth game. Those are so rare now...