3*3 and skewb help please

[GooseCuber]

I'd like to get get better at 3*3 and bring my average down to around 12 from my current high-15 to mid-16, but I'm not very sure what to focus on. I used the multi-phase option on CS timer and my current splits are as follows(average): Cross: 2-3 seconds, F2L: around 7-8 seconds, OLL: 2-3 seconds, and PLL: 2-3.5 seconds.
Then there's skewb. I pretty proud of my side events, but skewb makes me want to cry. I average around mid 8 seconds but just can't seem to get better. I use the GAN skewb and Sarah's intermediate method.
Any help would be appreciated.

 

[JDAW6]

Definitely get ur last layer faster i was also like this then drilling my pll and oll made me average 12

 

[Cuber Score]

I agree with @JDAW6 for your last layer. For your F2L, practice your look-ahead, and for cross, try doing slow solves to accustom yourself to more efficient solutions. If you ever need help with things like efficiency, fingertricks, and basically any cubing topic, JPerm is the way to go.