When your trying to reach Gold in ranked it takes a lot of time to get there i advise if u want to get to gold u should practice ,make sure u can play a champ for each role and lane. i had a friend who was in silver 4 and drop to a bronze 1 because she didn't take the game so serious also if ur team is ever arguing and its losing u focus try muting them so u can focus.. playing pvp can help your skills.. another strategy you can try is making a custom game or joining against higher ranks players or u can start out by playing against bronzes silver etc.. improve ur runes and masteries. some people get their runes from online. i usually think of my champ im playing...is it a ap or a ad champ .. if its both what do i want to chose to build... ap or ad..
one thing people do when in a battle is they'll just focus on the kills. cs is also important..able to get some gold to buy the items u need to get alot of ap or ad
i usually go into the jungle to take the golem monster and giant wolf buffs etc. if u see everyone in a team fight and think u cant take someone out dont try it..making sure ur fed is also important ull get the gold from them or a buff
communication and pinging is what claims victory