First things first...There's no secret to design.
Anybody can be a designer, it's the easiest thing in the world. In order to think about what you want out of a space, first think about descriptive words that set the tone for the room you're looking to decorate.
Take the bedroom, we'd want to use words like; comfy, inviting, relaxing. Summer is all about a fresh start, get color in there. Whereas in the fall and winter it's all about cozy and warm. It alters slightly but regardless, we want all to be both comfortable and inviting.
A bedroom should be beautiful.
It's about incorporating a blend of colors and patterns within a space, to make it feel a little bit more sophisticated.
Good sheets count.
You want to make sure you're going for good sheets, because that's what's touching your skin. And then you can layer back and forth with duvets and sheets. Bedrooms are the easiest rooms to design!
When it comes to the big ticket items, such as a bed frame, I always suggest going neutral. And then all you're changing out is the top of the bed, depending on the season.