Я думаю, что мне стоит сделать паузу.

In Russian, when you have a main clause plus a subordinate clause introduced by что (I think that…), you normally separate them with a comma: Я думаю, что ….
This is standard punctuation for subordinate clauses.

Often yes. In everyday speech, что is frequently dropped after verbs like думать:

• Я думаю, мне стоит сделать паузу. (more conversational)
• Я думаю, что мне стоит сделать паузу. (a bit more explicit/neutral)

You still keep the comma because the second part is still a separate clause.

Because стоить here does not mean to stand.
In мне стоит + infinitive, стоить means it’s worth (for me) to… / I should….

So:

• мне стоит сделать = it would be worth it for me to do / I should do Not:
• я стою = I am standing

мне is the dative form of я (to me / for me).
This construction treats the “person” as an affected party:

• Мне стоит… = It’s worth (it) for me… / I’d better…

Dative is very common in Russian “impersonal” or semi-impersonal expressions about advice/necessity.

It’s usually softer than я должен (I must) and often closer to:

• I should…
• It might be a good idea for me to…
• I’d better… (depending on tone)

For stronger necessity, Russian more often uses мне нужно/надо.

This is about aspect:

• сделать (perfective) = do/make once, complete the action → take a (single) pause
• делать (imperfective) = do in general / repeatedly / as a process

Here you’re talking about taking one pause, so сделать fits best.

They’re close, but not identical:

• сделать паузу = take a pause (often shorter; can be in speaking, work, music, conversation)
• сделать перерыв = take a break (often longer; common for work/study, like a lunch break)

Many situations allow either, but перерыв tends to sound more like a “break period.”

Because сделать takes a direct object in the accusative case.
пауза (nominative) becomes паузу (accusative singular feminine).

Yes. Russian word order is flexible, though the neutral version is:

• Я думаю, что мне стоит сделать паузу.

You might also see:

• Я думаю, что стоит сделать паузу. (dropping мне, more general)
• Думаю, мне стоит сделать паузу. (more conversational; dropping я)

Changing word order can shift emphasis, but the core meaning stays.

Russian can drop the subject pronoun when it’s obvious:

• Думаю, что мне стоит сделать паузу.

Including Я can sound slightly more explicit or emphatic, or just stylistically neutral depending on context.

Both can translate as I think, but:

• я думаю is more about your current thought/feeling, often softer and more personal
• я считаю is more like I consider / I believe / in my opinion, often firmer or more “reasoned”

In this sentence, я думаю sounds natural and a bit tentative.

Yes, and it changes the feel:

• Стоит сделать паузу. = It’s worth taking a pause / One should take a pause (general advice)
• Мне стоит сделать паузу. = I should take a pause (advice specifically about yourself)