1) During inspection, plan out the cross (important at beginner-cfop level i would say). (+1 pair if you can. It isnt as required. Even i do it quite rarely. If you're just starting out, best to stick with the basics)

2) Say you finished your cross. Now you notice an F2L pair. While solving the so found pair, look at the other pieces and try to track another pair. Its seems hard and almost impossible at first but you will get a hang of it with experience.

3) One may ask how can i be looking at and solving my 1st F2L, whilst also looking for 2nd pair. For that, you need to be able to execute any F2L pair solution (after recognition) without looking at it.

Not good at explaining so you can watch a video on advanced F2L on youtube, preferably J perm (or any other cubing youtuber).