Random assortment of specific tips that helped me climb from iron to emerald
Many moons ago I managed to hit iron 4. Many moons ago I spent months of my life trying my hardest to break into Silver by consuming nearly every guide I could find. Recently I hit emerald 3 with a 61% winrate in my last 60 games and a 63% winrate in my last 80.
I'm by no means the best player ever but I still think some people will find the following advice useful. They're condensed, hyper specific tips you can implement instantly. It's all advice that allowed me to see a noticeable increase in my winrate when I started to implement it.
Pick 1 lane and pick 1-2 champs. Play nothing else. Don't swap between mid and bot. Choose. One tricking a champion far outweighs trying to counter pick or play for team comp especially in low elo. Play a champion you enjoy, not what's in the meta.
Play for your wave state, not for kills. Play for objectives, not for kills. Objectives and gold are how you win games. I've seen so many players chase kills and they ended up losing way more gold than they gained. Another example is you blow your sums and ult on a kill right before a drake but the enemy respawns just before the drake is up and is able to tp, you now don't have an ult or sums for the fight and you lose, whereas if you didn't go for the kill you may have won the team fight + drake and be in a much better position.
Learn about turns. There's 2 examples of turns I can give. Example 1 is playing around cooldowns for short trades, if they use a key ability, there's a short window where they can't use it and that's your time to fight. Example 2 is playing around wave state, if the wave is nearly under your tower pushing towards you and you both die, you lose your entire wave, if you both die and minions are equal that sets up a freeze, you need to make sure that when you fight you don't risk losing your entire wave in the process.
Learn proper wave management, there's plenty of good guides on YouTube
Learn to take good recalls and don't get greedy. Staying for an extra plate is how you lose lane. If the enemy recalls and you stay, they now have item advantage when they come back. If you recall as they come back to lane they'll also take a plate and negate any advantage you had. Good recalls are situational but good habit generally include recalling 30s before an objective (unless you have tp), and recalling when the wave is under enemy tower. If you need to take a bad recall, aim to recall on a cannon wave, you won't lose as much.
Look at your map more
Learn to track enemy jungle. If you know jungle timers and which way they path, you'll avoid way more ganks.
If your teammate makes a stupid play let them die. 1 death is better than 2. Don't follow stupid plays.
Ping more. Your communication probably sucks. Spam ping when objectives are up, ping danger when your laner is missing. Let your team know what you want.
Mute chat and don't tilt, if you play on tilt you will lose. If you tilt your team you will lose.
Don't play for KDA. Not all deaths are equal. I frequently have terrible KDA and kill participation but I'm at every objective and I know when to push side lanes. Play for your team and for objectives.
Learn to identify your win condition. Most games have a win condition. If your adc is playing well, you must sacrifice your life to keep them in the game. Let the adc kill everybody. You don't have to carry every game.
Play around vision and match tempo with your team. If your team are in your jungle and base and you're hovering around 2nd tower, you're probably going to die. Aggressively push only when you can see the enemy or your team are matching side lanes forcing the enemy to choose.
If you have tp, play the opposite side of the map to the spawning objective.
Learn your champions role and identity. Play with intention. Do you push sides? Do you assassinate the adc?
Don't die before objectives, ever. Avoid using your ultimate or summoner spells before objectives as well.
Roam when wave is pushed under enemy tower. Slow push the wave so you get a longer window to roam. If you roam whilst there's still minions to be killed you'll likely lose more than you gain.
Make decisions quickly. A bad decision done quickly can sometimes be better than a good decision done slowly. Indecisiveness loses you games.
If you use mana, don't spam your abilities on the wave until mid to late game. Ability spam is how you run out of mana quickly and then lose a fight and die.
Don't kill inhibitors before 25 minutes. If you kill an inhibitor and can't quickly end the game, you give the enemy free gold
Play safer when you have a bounty
Don't force objectives or over stay. A bad baron call will lose you the game. Taking mid tower "quickly" because the enemy team is dead isn't worth more than securing soul. Games have been thrown because players want to end quickly and get it over with.
Play for your winning lane. Don't gank your 0/5 top laner unless they scale heavily and it's a guaranteed kill.
If you lose 2 games in a row stop playing for the day. Playing after 2 losses is how you suddenly go from plat 4 to gold 4.
If you use tp, save it for objectives or really good team fights after the 15-20 minute mark. Making good tps is how I've won so many games. I used to just tp back to lane and it was such a waste.
There's probably more tips I could give but I wanted to go for an even 25. Feel free to ask any questions :)