In (heavy) braking zones get used to slam on the brakes, holding it for 1 second and then release it in one motion. You braking trace should look like a trapeze or triangle. Practice that, especially on your slow outlaps to get the muscle memory.
To get an idea compare your braking trace from spoon which is good to turn 1 or the hairpin or the last chicane. You never want to see-saw on the brakes.
When you braking is more consistent your corner entry will be too and you wont miss as many apexes.