And, if you want to jungle:
I didn't buy runes till I could buy the level3 ones...
I learned to jungle w/o runes, which was a nightmare needless to say(had to port home 1-2 times between the 2 big camps), but I guess it really payed off, cause now everything seems so easy w runes.
Also, only jungle if you are really prepared to take a lot of **** from your teammates. Everything that goes bad is, no doubt, because of your lack of skill and presence in the lanes. No matter if you ganked every lane 3 times and succeeded in those ganks. In the end it is the jungler who ****ed it up
Since it is a team game...
Usually the really bad players start the circle of blame, but if you hear the blame train coming just step out of the way,don't respond, think of it as a traffic jam, you can't convince the man honking behind you and shouting "MOVE IDIOT" w logical arguments...like you would move but you can't cause of the other cars...see? this doesnt work
Try to point out to your team that you can't do anything if they push lanes.
Let them tell you if there are wards so you dont waste time finding out when they back constantly.Also used summoner spells could be really handy...example mid used flash, now you know you can go in for the kill.
Give 2nd blue to mid, mids love 2nd blues
Don't dive heroes when they have heal as spell or are in fact Anivias with has passive on...
Oh and always watch minimap...dunno if I forgot something...feel free to add