Some things I enjoy sharing in gratitude:
A heartfelt hand written letter expressing your gratitude, or maybe random hand made cards of some kind or funny ones from a dollar store if the letter and home made ideas feel too "mushy", a home cooked meal or some kind of home made goodness, use dry erase markers to write notes or draw something on their mirrors/windows, write random notes and stick them in a place they'll find them later, a rock you find on a nature walk that you can use a sharpie to draw on a heart or some other sentimental meaningful message to you both for them to stick in a potted plant, on their desk, in their car, or in their pocket, or wherever they choose, if you grow anything, share the harvest or split up some houseplants to share with them, share more time and space whenever possible simply enjoying moments that aren't under duress, and hug them every chance you get, if they're a hugger.
I always hear that living well and healthily is the best form of revenge, but I feel it's also a good way of showing appreciation to those who've hung in there with us, or those who chose to reach out and help in a moment of need even if they didn't know us, by ensuring we're able to keep paying it forward, as they did. Good idea for a thread. I needed that reminder today. Thank you.