Like speedcuber4221 said, you could use the Fridrich/CFOP method. It can be used to solve the cube very quickly.
As for getting faster, practice can help a lot.
speedcuber4221 wrote:what i did is i used the lbl mehtod and got similar times that you are getting. then i learned f2l then i learned 2 look oll and pll. then now i am learning the fridrich's method.
F2L, OLL, and PLL are steps of the Fridrich method. The other step is the cross. If you do the cross, F2L, OLL, and PLL, then you are using the Fridrich method.