Well you play extremely aggressive early game champs, so it's very likely you'll get ganked a lot early on. Make sure you're last hitting, not pushing, that way you're not too far out and still getting gold. Don't start fights you can't win. I know playing champs like Irelia and Riven you kinda feel like a dueling God that can win any fight, but that's not true. Pick your battles, ward out deep, and when you have to, sacrifice some gold by chilling under tower instead of last hitting. With Irelia and Riven you can even go into the jungle while your lane is pushed to catch up on gold, then go back to lane after killing golems or gromp or something.
Riven can jump over the wall to get to gromp/golems, Irelia can dash to them if you have vision of them.