No se me ocurre otra manera de resumir el informe.

This is the very common Spanish pattern ocurrírsele algo a alguien, which means for something to occur to someone or to come to someone’s mind.

So:

• me = to me
• se = part of the verb pattern ocurrírsele

A very literal breakdown is:

• No se me ocurre otra manera...
• No other way occurs to me...

In natural English, that becomes I can't think of another way...

So the person doing the mental experiencing is shown by me, not by making I the grammatical subject.

Because the grammatical subject is otra manera de resumir el informe, and the head of that subject is manera, which is singular.

So Spanish is really structured like this:

• Otra manera de resumir el informe = the thing that might occur to me
• se me ocurre = occurs to me

That is why the verb is singular:

• No se me ocurre otra manera...

If the subject were plural, the verb would be plural too:

• No se me ocurren otras maneras de resumir el informe.

English learners often expect the verb to match me or an implied I, but in Spanish it matches manera.

Spanish often leaves out subject pronouns when they are not needed.

Here, yo is unnecessary because:

• me already tells you who is affected: to me
• the structure se me ocurre already makes the meaning clear

So No se me ocurre... is the normal, natural version.

You could add emphasis if you wanted:

• A mí no se me ocurre otra manera de resumir el informe.

That sounds more like As for me, I can't think of any other way to summarise the report.

Because otro / otra normally does not take the indefinite article in Spanish.

So Spanish says:

• otra manera
• otro libro
• otra idea

not:

• una otra manera
• un otro libro

This is a very common difference from English. Spanish otra manera already means another way, so una is not used.

In this negative sentence, it often feels like any other in English.

So:

• No se me ocurre otra manera de resumir el informe

can naturally be understood as:

• I can't think of another way to summarise the report
• I can't think of any other way to summarise the report

Spanish often uses otro / otra in places where English prefers any other.

If you wanted to make the negative idea even stronger, you could also say:

• No se me ocurre ninguna otra manera de resumir el informe.

That is closer to I can't think of any other way at all.

After nouns like manera, Spanish very commonly uses de + infinitive to mean way of doing something.

So:

• manera de resumir = way of summarising
• forma de hacerlo = way of doing it

This is the most idiomatic pattern here.

Para + infinitive usually expresses purpose: for doing / in order to do. It is possible in some contexts, but after manera, de + infinitive is the normal choice.

So otra manera de resumir el informe is the standard, natural phrasing.

Yes, if it is already clear what it refers to.

So you could say:

• No se me ocurre otra manera de resumirlo.

That means I can't think of another way to summarise it.

In the original sentence, el informe is used because the speaker wants to name the object explicitly.

Both are correct:

• ...de resumir el informe = more explicit
• ...de resumirlo = more compact, if the context is clear

Because with this verb pattern, the order is fixed: se comes before the indirect object pronoun.

So you say:

• se me ocurre
• se te ocurre
• se le ocurre

not:

• me se ocurre
• te se ocurre

This is something you mostly just have to learn as part of the construction ocurrírsele algo a alguien.

It works like other common expressions:

• Se me olvidó. = It slipped my mind / I forgot it.
• Se le perdió el móvil. = He/She lost their phone.

They are related, but they are used differently.

ocurrir by itself usually means to happen:

• ¿Qué ocurrió? = What happened?

But ocurrírsele algo a alguien means for something to occur to someone / come to mind:

• Se me ocurrió una idea. = An idea occurred to me.

So in your sentence, it is not the happen meaning. It is the come to mind meaning.

That is why No se me ocurre... means I can't think of...

It is the present indicative.

Spanish uses the present here because it describes what is happening in your mind right now:

• No se me ocurre otra manera... = No other way is occurring to me right now

In natural English, we often turn that into I can't think of another way, but Spanish does not need a verb like can here. The present tense of ocurrírsele is enough.

Yes, very natural.

It sounds like normal educated Spanish and is a common way to express that no alternative is coming to mind.

Very similar everyday sentences are:

• No se me ocurre ninguna solución.
• No se me ocurre qué decir.
• No se me ocurre otra forma de explicarlo.

A close synonym here would be forma instead of manera:

• No se me ocurre otra forma de resumir el informe.

That also sounds natural.