Check out this video series by Dota D.Bowie. Many good tips on how to perform better on your role.
HOW pros outplay you # 1 (Mid) feat Ana, Arteezy, W33, Sccc [Skywrath, TA, Windranger, Storm]
HOW pros outplay you # 2 (Offlane) feat S4, Waga, MidOne, MSS [Tide, Axe, Pudge, MK]
HOW pros outplay you # 3 (Support) feat Zai, GH God, Sonneiko, Jerax[ET, IO,Riki, Lion]
HOW pros outplay you # 4 (Carry) feat BigDaddy, Dendi, MidOne and Bulldog [Alchemist, Void,CK,LD]
HOW pros outplay you # 5 (Mid) Ana, Miracle, Sumail, EE[SF, Tiny, Invoker, Mirana]
HOW pros outplay you# 6 (Offlane) Khezu, Moon, Universe, Mind_Control[Brew,Mag,DS,ES]
HOW pros outplay you# 7 (Support) Zai, Cr1t, EGM,Kuroky[Tusk,MK,Warlock,ES]
