The solution I think is to try our best and see what happens. (what punctations is needed) for the sentence

The solution, I think, is to try our best and see what happens.

Explanation:

In this case, it is necessary to add commas to the sentence. It is said by academics that there are eight rules to use commas. One of them refers to the use of a comma to indicate direct address. In this case, the clause I think goes before the object, which is the offered solution by the speaker, meaning that it is the direct address.

I believe it should be: The solution, I think, is to try our best and see what happens.