grammar - When we talk about a general thing and the event in the adverbial clause happens earlier, what tense should we use?

When we talk about a general thing and the event in the adverbial clause happens earlier, what tense should we use?

Please help explain a bit, thank you.

Example 1

I usually don't feel terrified after I watch / watched / have watched horror movies.

Example 2

I have a super power. I don't feel tired during the day if I didn't / don't / haven't slept sleep well the night before.