Any ideas for prenup clauses to discourage fighting at a future divorce?
To make this answer self-contained, allow me to restate my comment (especially since it is uncomfortable to some who might seek to have it removed):
Don't get entangled with lawyer issues in your prenup. They will find
a way to overcome it, drag your court proceedings anyway, and prolong
litigation for as long as you have any money left in your bank
account.
Instead, I strongly encourage you to do research on divorce & custody
law, and then enter a prenup with a clause to the effect of barring
attorneys altogether if divorce or any dispute arises. See this
report and don't become their next target.
That being said, now I address your follow up question:
Any suggestions on how an average person would do more research?
What follows is one sketch on how to get started. In assessing how much this approach makes sense to you, consider two preliminary remarks:
I am not knowledgeable of family law. This means that prior to drafting this answer I had (and have) essentially the same starting point you do.
What I have is litigation experience and legal research skills, so don't be discouraged or intimidated if you initially think some resources or ideas would not have occurred to you on your own. Sooner or later you would have gotten to these sources as well, and I only intend to obviate the time gaps it may take for an inexperienced person to identify the legal aspects you need to know.
With your follow up question in mind, I went to leagle.com, entered "prenuptial agreement" in field "This Exact Phrase", selected Minnesota in "Search By Court", and clicked on Search. The search brought 8 results.
Only one of the 8 cases was released by the Supreme Court [of Minnesota], McKee-Johnson v. Johnson, 444 N.W.2d 259 (1989). The other 7 are from the Court of Appeals some of which constitute legal precedent (the rest do not, but one could still gain useful knowledge from there and find additional case law cited therein).
I started reading the opinion/precedent McKee-Johnson. There I learned, at the outset, that another term for prenuptial agreement is antenuptial agreement. This is relevant because then I conducted another search, now for "antenuptial agreement", which brought 58 cases. Many of these are more recent than, although not necessarily in conflict with, the McKee-Johnson decision. My point is that it is in one's best interest to try different search terms.
The McKee-Johnson opinion discusses, inter alia, the validity and enforceability of a prenuptial agreement. The opinion makes reference to Minn.Stat. 519.11. A search for that statute took me to chapters 517-519A of the [current] [Minnesota Statutes]7. I am not reading the MN statutes, but you should in order to ensure the terms and circumstances of your prenuptial agreement are compliant with statutory law.
The McKee-Johnson opinion ascertains the legislative history & intent of the aforementioned statute, which the lower courts had considered ambiguous. A review of the legislative history led the court to the conclusion that the statute sought to encompass also marital property, not just nonmarital property. See McKee-Johnson at 264-265:
We find nothing in the legislative history which indicates that the
statute was hostile towards agreements which contained provisions
relative to the disposition of marital property.
[...]
We find nothing in the legislative history which justifies the
conclusion that the legislature harbored hostility toward the
inclusion of provisions respecting disposition of marital property in
pre-marital contracts, or that such provisions are void or
unenforceable. To the
[265]
contrary, the statute recognizes the validity of such a contract so
long as it "would be valid and enforceable without regard to this
section."
Please note that I am not reading the entire opinion, but you are encouraged to do so (since you are the one getting married and also because you might not be familiar with most of the general principles/doctrines involved). This will make you acquainted with concepts of law. If the meaning of a term is unclear to you, you can consult the Black's Law Dictionary or search for case law that uses that term.
Although McKee-Johnson nowhere mentions the Restatement (Second) of Contracts, there is an important overlap insofar as a prenuptial agreement is a contract. For instance, McKee-Johnson touches on wife Mary's repeated refusal to obtain legal information separately from husband Lance. These refusals amount to Mary's bearing the risk of a mistake as defined in the Restatement at § 154, which has legal implications regarding the procedural fairness discussed in McKee-Johnson*.
Additionally, you might want to visit the court in your location and search for divorce cases. Some of these might have exhibits with the parties' prenuptial agreement. Those documents might give you some ideas on the format and wording of an agreement. However, it is utmost important to ensure you understand the terms of those agreements and that they look acceptable to you if you are considering to adopt them.
At first glance, this learning process might seem a titanic task. To a great extent it is. But you have the advantage that you don't have an immediate need for litigation, whence it is safe for you to postpone for now anything that has to do with procedural law (motion practice, admissibility of evidence, and so forth). By contrast, some of us have had to learn both substantive and procedural law at once in order to pursue in court a remedy for the wrongs made to us.