I get anxious when I see lanes losing so i try to help if i can but if theres more than one that needs help i cant decide where to go. Should put priority on bot or whichever lane i think would benefit the most late game? Sometimes it just seems like a lose-lose situation.
Before the game starts, try to guess who will be the most agro. Two fighters top usually duke it out early. While certain ADC's like Draven like to go ham LVL 1.
If you can get good at predicting your opponent jungler, just counter gank and no one can say you didn't do your job.
Don't camp a winning lane more than they need it. IE you fed a lane enough so they can win even when ganked, so ignore them.
Also don't camp a lane that's going to lose anyway. Your top has 5 kills, but still dies every push. Just stack dragons and stay bot side.
If all your lanes are losing, Just try to predict dives and get as many objectives as you can. Hope this helps a little bit.
Get as much vision as possible, and make choices; If you can or have to contest the enemy jungler, try to be on the same side as them at all times. If you dont want to or cant, be on the opposite side. You spot them clearing krugs or your top is about to get ganked? Take dragon or 3v2 bot lane, if theyre closer to their tower than the middle of the lane. Gank mid if no objectives are up and your bot is already pushed into the enemy tower.
Do NOT gank losing lanes. Winning comes from maximizing advantages, not from balancing out losses. A weak laner + jungler can still lose to the other laner or at very most maybe gets a flash or some gold out of it, but they're going to end up losing it again anyway. A strong laner decides fights.
Dont sleep on dragons or Heralds, except cloud drakes. (Or Oceans if you have a Zed mid and are playing Rek'Sai etc.)
