1)If you don't already have a passport, get one sooner than later! And if you do have one, double check the date... trust me I've been there!
2) Don't forget to buy adapters ahead of time
3) I recommend buying charging blocks with the European Type G plug. That way you don't use all your adapters just on charging phones! Here's a link to a website that sells them for cheap: https://ie.mobilefun.com/core-dual-usb-port-mains-charger-white-67022
4) Don't forget to change you're phone plan to include international if you need your phone while you are there... There is always the option to buy a sim chip when you get there as well (normally between 25-65 euros) I always go to Vodafone.
5) Don't forget to tell your bank that you are traveling or else the will suspend it, which is such a pain!
With the current environment, COVID protocols are constantly changing. Ireland is a bit more strict than the states so please make sure before you book any flights that you are aware of what is required both to travel and once you get to Ireland. If you are worried about it or have any questions, once again, feel free to reach out to me. 415.827.0811