When traveling with toiletries including medications, be aware of the temperatures you are putting them through. Some medications, including contact solutions, have storage temperature ranges for the ingredients to remain potent. It is very easy to go outside of these ranges when leaving luggage in your car or checking it with an airline. I realize that there are times the extremes cannot be avoided but they should be considered and avoided. Simply bringing your toiletries with you when you are going to be at a location for an all day meeting can be helpful.
I have gotten some strange looks when I have brought my luggage into my office in the morning. However I have also had the fun of melted deodorant from leaving luggage in the truck in 100 degree sunshine. Of the two, I will take the odd looks I just simply explain about melted ineffective products.