I've traveled to 30 countries with my kids. I always do these 4 things before leaving home.

• Before I had kids, I didn't put much thought or prep into my travel plans.
• A few encounters while abroad have made me change my ways now that I often have kids with me.
• I now travel with apostilled copies of their birth certificates and a letter from their father.

Before kids, I traveled the world alone with nothing more than a backpack and a worn guidebook. I rarely made plans in advance and enjoyed the spontaneity and surprises that were a part of globetrotting without much advance planning.

Once I started traveling with my children, that approach seemed irresponsible and, at times, downright dangerous. Now, I put a lot more care and thought into my trips before leaving home.

As someone who has taken my kids to 30 countries on six continents, I've found that a little advanced planning goes a long way. Here are the four steps I always take before traveling with my kids to help ensure that our trips go smoothly and that we all stay safe.

I always look up the emergency number for wherever we are.

Once, while driving in Canada with my kids, I got lost in a dark, industrial neighborhood at night. No one was around, and I started to feel uneasy, unsure if anyone was lurking in the shadows.

At home, I knew I could call 9-1-1 for assistance in an emergency. However, as my panic level started to rise, I realized I didn't know who to call for help in Canada. (I've since learned the number to dial is actually 9-1-1, but that's not the case for most other countries.)

Eventually, I found my way back to civilization, no worse for wear. However, now I always look up the emergency number to call when I land.

On a subsequent trip to Paris, an Uber began veering wildly off course. It turned out the driver had detoured due to construction, but I was glad I knew to dial 1-1-2 instead of 9-1-1 if I thought my kids were in danger.

I double-check that my health insurance covers us wherever we are going

When I was young and reckless, I assumed I would never get sick or injured, especially on a trip. In hindsight, I was remarkably lucky that I never caught more than a mild case of Montezuma's Revenge abroad.

After a health scare on a trip to Jamaica, I no longer take any chances. Midway through what was supposed to be a relaxing trip, my son developed a fever and started vomiting. The resort where we were staying called a doctor who suspected appendicitis. I panicked, wondering if our insurance would cover a pricey operation or medical evacuation.

Fortunately, my son recovered quickly with an antibiotic, but now I always double-check that our health insurance will cover us abroad, including to far-flung destinations like Antarctica. If not, I will look into buying travel insurance that will cover medical care and evacuation. Before travel, I also check that my children have all the recommended vaccines for our trip.

I always pack my children's birth certificates

My first trip abroad after becoming a mother was to a destination wedding in the Caribbean. I was allowed in easily with my infant son strapped to my chest. However, leaving was not so easy. When trying to return home, a border guard questioned me extensively, asking for proof that I was the baby's mother. I managed to convince the agent that I was indeed my son's mother, but the situation rattled me.

To avoid a similar issue, I now carry official copies of my children's birth certificates when we travel abroad. For good measure, I had the documents apostilled by the Secretary of State for Washington, DC, where they were born. An apostille is a type of verification similar to notarization, but it is recognized in more than 125 countries worldwide, making it a better choice for international travel.

Although this may seem like overkill, I have been asked for proof that my children are mine twice, once when entering the United States and once when entering the U.K. Although I likely could have proven my children are mine without these documents, I don't want to take any chances, and having them on hand made the process much easier and faster.

I get a notarized letter from my children's father stating that I have permission to travel with them

Although my husband and I are happily married, his demanding work schedule often leaves me traveling solo with our kids. On several occasions, immigration officials have asked me for proof that I had my husband's permission to take my children abroad.

Once, I was asked for the same documentation when returning to the United States. Now, I always carry a notarized letter of consent signed by my husband. I use a free template I found online and update it with the specific dates and location for every trip, then I take it to my bank to have it notarized for free before we go.

Although carrying additional documents can be a pain, I remind myself that additional paperwork is for my children's protection because it helps combat child trafficking and kidnapping.