You could try manipulating those energies yourself. Just before you start, for a thirty seconds breath in and out deeply. Then go every item through one by one, hovering your hands above them (or whatever method works best for you for energy manipulation), seeing (visualizing) the negative/black/junk energy sink deep into the ground and being replaced by golden/pure/clean energy floating down from the sky (or universe or a planet, it's enough if you believe/think it's clean and pure energy). Another method is just to 'do it': You tell firmly what is going to happen (manifesting your will), believe in yourself and you are able to do whatever it is you're trying to do. This is often considered harder, with no aid of visualization in this, but it can also be more effective. What matters is that you believe in yourself and what you're trying to do. There are countless different kind of methods, and not all of them work for everyone. Just go with what you feel comfortable with, what feels "right" to you.
And about a comfortable environment. There's a term 'Soulscape' I use for art (for me it's paintings, for someone else it could very well be statues, or wall clothes, etc.) that invoke deep thought and emotions (longing, joy, sadness, or something else), a piece of art so great, or rather, meaningful to me (In other words, it speaks to me through every arch and curve, and stroke of color in it) that it makes me lose myself in it. As for how to get these 'soulscapes'... You just know if you like the painting/the statue/the piece of art when you see it. You just know that you want it. It doesn't matter whether it's cheap, or expensive either. And if it's a painting (for me it's always the paintings) it makes the room a lot more comfortable to be in.
Hope this helps.