I have become significantly worse at cf problems though some of this attributes due to lack of my practice but now that i am back again how do i practice so that i can start seeing patterns again like i used to at some point??

How to be better at this?
I have become significantly worse at cf problems though some of this attributes due to lack of my practice but now that i am back again how do i practice so that i can start seeing patterns again like i used to at some point??
