Pretty often I get feelings of who I got to pray for, everyone needs prayer! :3 you kind of see it when they need it, especially when you listen and or witness the circumstances their in.
I have a mental list of all I pray for. I also mention, while praying, to keep those Ive forgotten about over the years in my prayers. While I pray the rosary I like to have an intention on every bead, for example a friend or the pope etc.
Ive gotten into a cool habit of the five finger prayer, basically every finger covers the basics of those in need of prayer. Thumb is family and friends, index finger are teachers, tallest finger is for world leaders, next finger is for the sick and the poor, and the pinkie is for oneself although I like to add anybody whos in need of prayer first.
(Started to see my comment is kinda off topic my apologies)