I trywill try to break my 1500m PB tomorrow. I will try to break my 1500m PB tomorrow.

Tomorrow I will run 1500m in track. Tomorrow I will run 1500m in track.

Adding "tomorrow" to this sentence makes it more clear

I need to go to bed early and eat food enough food. I need to go to bed early and eat enough food.

I need to go to bed early and eat food enough food. I need to go to bed early and eat enough food.

I sendwill share the results in tomorrow's diary I will share the results in tomorrow's diary

Since you're talking about writing about the results in the future, you need to use a future tense "Share" in this sense can mean to tell us about something; this would make more sense here than "send", which would imply that you'd be sending/showing the results to specific people

I sendwill put the results in tomorrow's diary entry. I will put the results in tomorrow's diary entry.