The internet is filled with travel planning information. There are lots of travel planning sites and lots of travel blogs. How can someone know what information to use? The answer comes down to your expectations and experience. Depending what you expect from your trips, some sources are better than others and the more you travel the quicker you find resources. Here are some good resources I use all the time for planning my trips.
Note: This page includes some affiliate links for services I use. If you click on them you get the best price available and I get a small payment. I am really grateful if you use them, but you don’t have to.

Planning

Trip Advisor
Very helpful site for most tourist attractions across the world. I find Trip Advisor invaluable especially in the beginning phases of planning a trip.
Viator
Excellent collection of tours, museum tickets and city passes throughout the world. If you’re looking for a walking tour or boat ticket then Viator is the place to search. Viator is also a great place to figure out local itineraries even though you will not buy anything.
The Secret Traveller Blog
The travel writer from 1Cover has gone incognito to share some of the best kept secret spots around the world and other useful travel tips (collaboration with 1Cover).

Plane tickets

Air France/KLM
I have always been impressed by the service and prices from AirFrance KLM, even before becoming the same company. Their connections to Europe are great and their prices are the best. Highly recommended.
Cheapo Air
A good place for bargain hunters. Sometimes you can find great deals if you are really flexible on your travel dates.
Sky Scanner
Great mobile app and website for setting up price alerts for certain routes. Another great site for bargain hunting…if you’re flexible again.

Hotels

Booking
I have used Booking.com throughout England, Italy, Germany and Austria. Everytime I have found that the reviews were true and I could actually get in touch with the hotel staff and get my questions answered. I highly recommend this website.
Marriott
I have used Marriott.com throughout California with very good results: excellent service for the price paid. Marriott seems to be overpriced in Europe, but in the USA, it is an excellent value.

Car rental

Auto Europe
In Europe I have rented from all major car rental services: Hertz, EuropeCar and Enterprise. You can save quite a bit of money by using Auto Europe to compare prices and services. Highly recommended.
Hertz
Over the last 15 years I have received excellent level of service and prices from Hertz especially in America. In Europe as well, Hertz has offered excellent service even though the price was slightly higher than other providers.

Electronics

Garmin GPS Unit. Works without internet connection or wifi signal and it is very reliable.

Motorola G5 Plus unlocked smart phone. Any unlocked smart phone will do as long as it is dual band so it works both in the US and Europe. The latest Motorola G5 Plus has an excellent camera and works great in Europe. Just buy a local SIM card with a local number and you’re good to go.

Two simple electric plug adapters for Europe or a reliable universal plug adapter.

USB car charger with two ports. This keeps my Garmin charged along with my phone, while driving.

Keepcalling calling card and phone app
Cheapest calling card and excellent app. Please use referral code: F4640 when signing up for an account.

Finances

Wells Fargo Debit Card
Costs me just $5 for each cash withdrawal without added foreign transaction fees.
Capital One 360 Checking Account
If I would open another checking account, this one is the best for foreign travel.
Capital One Credit card
Great cash back and no foreign transaction fees.
Moneygram
For sending/receiving money to/from any foreign country. Lowest fees and the best coverage.