Ummmm.... Looking at your LOLking.net page
http://www.lolking.net/summoner/na/68251933#profile
Looking at your stats it appears you prefer going Jungler. With that I see you love playing Zac. That's awesome, a good Zac can wreck and snowball lanes very hard. Especially with a Yasuo wombo combo.
Second, I'm looking at who you've played the most: Gnar, Ekko, Shen, Vel Kosby, Zac.
I'm assuming you're trying to break out of the Jungle phase because it gets boring by just playing the same champ over and over again. Understandable, but if you're good at something. Do it.
Thirdly, (and who am I to talk, I'm a Silver 5 scrub) your CS isn't that good with some champs. (Darius, Fizz matchups)
Don't focus so much on killing the champion, instead, focus on farming more and not missing cs waves. If you can get..... 70-80 cs by the 10 minute mark you're doing something right
You only have 2 rune pages. Looking at them I would probably take a look at varying between.... 4 champions around your rune pages that you feel you can work with. (I like looking at MOBAFIRE guides to get a general idea how to play a certain champion where. Runes n Masteries, etc)
Focus on runes and rune pages first, if you can live with spending a bit of cash. Buy rune pages when they go 2 for 1 sale next season. I'd also save your IP for if and when runes ever go on sale for 25% off.
In conclusion, you're on the right path. Step up your farming more. Farm is more important than chasing a kill. I try to live by a 5 second rule: I can't get it within 5 seconds, not worth my time.
Don't get in the mentality of chasing the enemy, even if you get the rush of it. (There are scenarios where you will want and need to. But not between the timers 0:00 - 20:00.)
Don't quote me though.
Final word of advice, Silver is no different than Bronze. I'm a leg up, sure. But I can't get up there more. Stuck in Silver ELO....
~ Communication is key. Pinging, Voicechat, etc~
Good luck, I'll see you on the rift!