One of the easiest ways to get better at the game is to refine your basics.
1st. Maximize your CS: The best possible CS you can achieve if you're farming properly is alittle under the current match timer. Example: Your current match has lasted for 16:45 minutes so the rough area you'd be at if you were farming perfectly is around 160.
2nd. Learn that every mistake could've improved the game for you. Most people in the lower elo's will write off a missed ability or something as "Oh sure I guess I missed it but it didn't matter that much, right?". The answer is, yes it did matter. Practice on properly timing and landing your abilities and you'll notice that you do much better.
3rd. Learn when and where to ward. One noob trap that high elo players set is the "Just place more wards and you'll do great", but what they don't tell you is when to ward and how to ward. First off you should always pink a bush when you know the enemy won't spot you placing it, this'll increase the life span of the pink and give you more long term vision. Second, you're warding to catch the enemy jungler so placing wards in side bushes is great but if you know what side of the map he's on it's more effective to try and ward his jungle on that side rather than a ward in your side bush and catch him later than you could've.
4th. Learn to playback. Not all champions are required to constantly pressure their lane and look for kills. Sometimes you're honestly better off just comfortably farming your lane and getting in harass IF your opponent is in an easy position for it, but not hard trades.
5th. There's no reason for you to be pushed up. If you've just pushed a wave into the enemy turret what's the point of following that wave? Just walk back after it's gotten to that point and sit roughly at the mid section of your lane or further back. This will prevent so many un needed deaths from ganks.
