(ForTo keeping my streaks haha.) (To keep my streak haha.)

(For the sake of keeping my streaks haha.) (For the sake of keeping my streak haha.)

(ForJust to keeping my streaks, haha.) (Just to keep my streak, haha.)

I missed buying tea this morning, which is why I am very sleepy now. I missed buying tea this morning which is why I am very sleepy now.

I missedforgot to buying tea this morning, which is why I am very sleepy now. I forgot to buy tea this morning, which is why I am very sleepy now.

I missed buying tea this morning, which is whyso I am very sleepy now. I missed buying tea this morning, so I am very sleepy now.

The original sentence made sense too but a word like “so” makes it more concise

I missed buying tea thismy morning tea, which is why I am very sleepy now. I missed my morning tea, which is why I am very sleepy now.

Or: "I forgot to buy tea this morning..."

Today is Saturday, and I am very exhausted, so I will only write casual notes for today. Today is Saturday and I am very exhausted so I will only write casual notes today.

Today is Saturday, and I am very exhausted, so I will only write casual notes for today. Today is Saturday, and I am very exhausted, so I will only write casual notes for today.

Optional to remove “for” in “notes for today”

Today is Saturday, and I am very exhausted, so I will only write casual notes for today. Today is Saturday and I am exhausted, so I will only write casual notes for today.

Caffeine has been a lifesaver in my whole life. Caffeine has been a lifesaver my whole life.

Caffeine has been a lifesaver in my wholethroughout my life. Caffeine has been a lifesaver throughout my life.

Caffeine has been a lifesaver in my whole life. Caffeine has been a lifesaver my whole life.

Caffeine has been a lifesaver in my whole life. Caffeine has been a lifesaver my whole life.