I spend a lot of time at libraries all over the United States and the world. One of the things that I have grown really used to is making sure that I have the means to capture the information that I find while I am there.
Here are the methods and tools that I use.
Notebook. Bound and loose leaf.
Sometimes, It is easier to go to the library with one small notebook, a handful of change and a USB drive. Other times, I know that I will be there for a while and I want to be as organized as possible. When I am in that mode of research, I bring a loose leaf notebook that I have pre-tabbed to make everything easier for adding to my computer when I get home.
Change or funds for the copier machine.
The way to pay for copies generally speaking is one of two ways. Drop some money into the machine or add some money to a card/your library card. Make sure to bring enough money to make twice the amount of copies that you are expecting to make. Not all libraries accept credit cards or are located near ATM's.
USB storage device.
Some but not all libraries will allow you to copy information directly to your USB drive. I always bring 3. A small storage with less than a gig, a medium around the 16-32 gig mark, and my jumbo, which is 1T. No matter what, I am able to copy as many documents and photos as I have run across.
Photos with phone or tablet.
There have been some weird things that have happened when I have been at libraries doing research.
A copier that had a paper jam prevented all of us who wanted to make copies from being able to do so. That particular library did not have the ability to copy to a USB or to email. I pulled out my phone, turned the flash off, took as clear of shots as I could manage and then painstakingly wrote, line by line the information and the source so that I would be able to return to that library in the future and have an easy time of finding my information.
Creative thinking to problems in accessing the information.
Another library had a microfiche library, but the machine's display screen was badly damaged. I ended up making 100+ copies of pages to find the portion that I was looking for. It was worth the cost because the information that I was looking for was very obscure.
Always notate your records.
I bring pens, pencils and highlighters to make sure that I don't miss something on the pages that I made the trip to find. A link to a family member was once found on an inscription in a church cookbook. You never know where you will find the link you need, but if you don't notate your records, you may never find it again.