We all may know about the importance of making mistakes and that failure could become the key to success.

Over time, I’ve learned that watching other people make mistakes and learning from them is a less painful path to success.

In the arena of estate planning, there’s a lot to be learned from the mistakes of others – including some high profile people. Let me share some important lessons.

1. Don’t die intestate.
Dying without a will is called dying intestate.

When Jimi Hendrix died at age 27, he didn’t have a will. Despite being very close to his brother, the laws of the jurisdiction where he lived dictated that his estate was inherited by his father, who left it all to an adopted daughter from another marriage.

Without a will, the intestacy laws of your province will dictate who gets what – which may not jive with your wishes.

And keep your will updated. When actor Heath Ledger died in 2008, his will was five years old; he hadn’t updated it when his daughter was born, so she wasn’t mentioned in his will and he left everything to his parents and sisters (he wasn’t married at the time).

2. Watch the impact of specific bequests.

A woman I once met left her cottage to her son and her investment portfolio to her daughter. She thought she was treating them equally. There was a sizeable tax liability owing on the cottage upon her death. The only liquid assets available to pay the taxes were part of the investment portfolio. In the end, the daughter was short-changed since the tax bill was paid out of her inheritance.

The woman’s will could have been worded differently to avoid this problem. When you leave specific bequests to certain beneficiaries (including by way of joint ownership or by naming individuals as beneficiaries under your registered plans, for example) your estate may be short on cash to pay taxes or debts, leaving the tax man or creditors chasing beneficiaries for the money.

3. Avoid the wrong executor.

A reader recently wrote me to share the story of a woman who died at age 86. This woman had named her best friend, who was the same age, as executor in her will. Within two weeks of the woman passing away, her best friend also died, leaving the woman’s estate without an executor. This caused additional costs and delays in distributing her estate.

When you choose an executor, choose someone who is very likely to still be around when you die (generally someone much younger) and name an alternative executor in the event your named executor is unable or unwilling to act in that role.

4. Protect your kids from a first marriage.

A gentleman I knew was in a second marriage, but his children were from a first marriage. Upon his death, he left all of his assets to his second wife who, upon her death, left everything to her own children from her first marriage. The gentleman’s children received nothing.

There are different ways to ensure your children do receive what you intend for them, including leaving assets to them outright upon your death, or placing assets in a spousal trust where your second spouse can access the income of that trust, but not the capital, leaving that capital to pass to your children upon your second spouse’s death. Pre-nuptial agreements can also play a role here.

5. Remember that promises aren’t binding.

Before his death, Marlon Brando promised his caregiver, Angela Borlaza, his house, but did not write it into his will. Ms. Borlaza went to court and had to settle with his estate. Even a letter of wishes, which details who you’d like to receive your personal effects, is not binding. The late Diana, Princess of Wales, prepared a letter of wishes that left certain assets to her children and godchildren. It wasn’t followed, and the godchildren received only trinkets.

A letter of wishes is still a good idea, but if you feel very strongly about specific assets, you may want to distribute those assets by way of your will.