So, inspired by Vita Sackville-West, I plucked a bloom and wandered about the grounds... yeah. Because my house and garden look so much like Sissinghurst. I hear it all the time.
Let me start over.
I picked a flower and walked around looking for possible companions in spots I know the daylily will be happy. Daylilies are easy, full sun to part shade (the more sun the more flowers) and nearly any soil conditions, though diminished flowering in hot, dry spots. Here are some of the photos I took!
with Daylily 'Paprika Velvet'. 'Liberty' looks a little muddy, however, the deep rich orange does a little blendy thing I like. And I like daylilies with other daylilies. Perhaps a yellow...
with tiger lilies. Doesn't grab me. I was thinking orange, burgundy spots...oh well. Not bad but not fab, either.
with a yellow variegated vinca. I kind of like this. And it's the start of a theme...
This is one way to play. As I wrote above, I learned this while reading articles of Vita Sackville-West's. She would wander around with a bloom, looking for other plants to combine and make the most of all present. And I know from reading of many other wonderful gardeners, they do this as well.
And while you're out walking around, take some photos - they give you the perspective to observe things like a plant's form and texture and how it combines and contrasts with surrounding plants, and allows you to learn to trust your eye, to know what you find pleasing.