1. You don't need to have everything out all the time. Do you wear your whole closet at once? No. Rotate your accessories the same way you do your wardrobe.
2. Mix your materials. I know, I harp on that a lot but it really makes such a huge difference in the overall feel.
3. Invest in a quality sofa. You can skimp on a lot of things, but a sofa should not be one of them.
4. Sometimes you need to bring in a professional. A truly objective party, with the right expertise, is also a good investment since it can help you avoid some costly mistakes.
5. Antlers as decor are so five minutes ago.