Eclectic style isn't a fixed look — it's an approach. The principle: a room can mix a mid-century lounge chair, a Victorian writing desk, a contemporary art print, a Moroccan rug, and a Japanese ceramic — as long as the mix has some unifying thread (a common color, a recurring material, a coherent mood).
Done well, eclectic rooms feel like the home of someone who's lived a real life and collected things that mean something. Done badly, they look like an antique mall booth. The difference is editing. Every piece in an eclectic room should pull its weight — be either visually striking, personally meaningful, or contextually right. If it's none of those, it gets cut.
The practical guidance: pick a unifying constraint before you start. A single dominant color (everything in cream, navy, or rust). A single repeating material (warm woods throughout). A single era anchor (everything else has to play with the mid-century pieces). The constraint is what makes "mixed" feel intentional rather than random.