Tips for climbing out of Gold?

So here's to another player struggling to get out of Gold and finally resorting to asking for help -_-;

Quick story: I was Gold 2 last season. Did placements and ended up in Gold 4. Won a ton of my games and eventually climbed all the way to Gold 1 and nearly got to around 90lp. That's when I took a nose dive and went straight down on a losing streak. Ended up back in Gold 4 and haven't been able to climb out ever since. I took a lot of breaks in between the time I started really losing. I even got my other account to Gold 2. But for some reason, I feel like my main account can just never climb out.

Previously, I played a ton of bot lane, with my highest winning champ being Janna. I did a fair good job with adc as well. Nowadays, however, I've noticed that I've been doing fairly poor with adc, so I tend to let others handle that. I mostly do jungle, supp, or top. Currently, I've concentrating on jungling with either Diana (mostly) or Sejuani, supporting with Janna, Lulu, or Taric, and top lane with Renekton. I can adc, but I feel like I'm really quite poor with attack move and all that stuff. Lastly, mid is probably my worse role. I like playing the champs that tend to go there (Cass, Syndra, Kennen), but I've noticed that I do much worse in ranked than in normals when I play mid.

Anyway, I dunno what I feel like I can do to get out. I know warding will probably be one of the tips presented, but I feel like I do a fairly decent job trying to keep the jungle warded. But besides that, what can I improve on for jungling, supporting and anything really? I honestly think that I'm probably a true blue Gold player, but I'd really like to improve my game and get to Plat for once (I'm kind of not fond of the idea of being Gold for 3 seasons straight lol..) Anyway, I've provided my op.gg in the link above. Don't mind the 18 game losing streak I had. Dang unbalanced teams in arams lol

But yeah, thanks in advance.