My table pallete and a hand-held kidney shaped palette that I use. I make hand held palettes out of white faced hardboard (called “masonite” in the US, I think?) with a light wood cross bracing glued onto the back.
This means that I can shape them to suit my arm and get the largest size that is practical without the weight being too excessive.
Over time, as the paint builds up, they get heavier (and heavier still) then eventually I’ll make another one or two. The materials are cheap so they’re basically expendable.
I always arrange colours on a palette as though they’re sitting within a colour wheel. It helps me quickly explore complex colour mixes and harmonies by providing a logical start to what is ultimately an intuitive process.