Taking in mind I am only a Gold player I am not saying that this is the ultimate way to climb the ranked ladder but because I am a Gold player I kind of understand the Bronze and Silver struggle, unlike Platinum and Diamond I can't just say be a better player all together because we in Gold struggle with that, here are some advices that are not mechanically difficult but more of a playstyle that might prove helpful.
Split push, this can be done in any lane (yes any lane), some champions have an easier time with it than others, I would say that for top you want tank champions with zzrot portal or a bruiser strong 1 v 1 like fiora or tryndamere, for jungle you want the same as top or Udyr who excels at this, mid lane try lich bane champions, zzrot portal is the go to on split push item but as a support you can also buy a banner of command and with adc any work but tristana really excels at it.
Dominate lane dominate game, top lane is one of the best for this since it is your very own isolated island, try to get a strong 2 v 1 champion since you will most likely be fighting the top laner and the jungler, Pantheon, Tryndamere, Graves, Quinn if done right you will be able to just swoop and take the game under your wing.
Help other lanes, yeah one way to go is to make it your very own solo game but the other is to play it the way it is supposed to be played, as a team, roam and help others, if possible give the kill to them let them scale and use this to your advantage, you can't 1 v 5 in end game so make it a 5 v 5.
That's all my advice so good luck in the rift.
Rabbit out.
