Color
               Color is a great way to obtain and create positive energy. The more lively the color the better.

Black my be stylish, but it can emit negative energies if used too much. Not suggesting to throw out all your black items, just be sure to keep the balance with a brighter color.

White is probably the best conductor of positive energy. White light contains all the colors of the rainbow, when seen throw a prism. This color is a very powerful one.

Here I found more information on specific colors.

Reds

are great for romance and action, but too much can invite anger.

Oranges

suggest warmth and enthusiasm, but too much can cause restlessness.

Yellows

invite joy and inspiration, but too much can cause feelings of uncertainty.

Greens

are healing and nurturing, but overdoing green can induce laziness.

Blues

are calming and peaceful, but too much blue (particularly deep blue or indigo) can attract depressive energy.

Purples

are good for inspiration and luxury. Violet in particular is good for healing and manifesting. Too many purples or violets can call in serious and even sorrowful energy. No matter what colors are used in your décor, be sure to strive for balance.

How does a psychic vampire work and how do they actually take your energy?

They do it many ways.

Some just sit almost in front of you and glare. Some of them just keep on churning, constantly going over and over the same things to make you agitated and incite you to spend your life force.

Sometimes you can see it with little children, that all they want to do is get all of the attention you have to give, to capture as much of your energy as they can, even if they can’t use it. You’ll commonly see this in just all sorts of people.

It’s an extremely common trait among passive aggressive people. One of the things about a Psychic Vampire is that in order for them to do what they do, you have to make a link with them. That means you have to be willing to engage them.

                                      TO ALL MY HARRY POTTER FANS OUT THERE.  

This is probably the most dramatic representation of an energy vampire. A dementor is a dark creature written about in the series and has claimed to be able to suck out any happy memory or feeling you have, leaving you feel lifeless and empty.

                             "Dementors are among the foulest creatures that walk this earth. They infest the darkest, filthiest places, they glory in decay and despair, they drain peace, hope, and happiness out of the air around them... Get too near a Dementor and every good feeling, every happy memory will be sucked out of you. If it can, the Dementor will feed on you long enough to reduce you to something like itself...soulless and evil. You will be left with nothing but the worst experiences of your life."

—Remus Lupin to Harry Potter

   Okay, so we have figured out how to protect ourselves from these energy vampires or psychic vampires, but we have yet to talk about HOW or WHY they seem to drain us of every last drop of energy that we gained through a long night of sleep.

    The good news is that people who are considered a psychic vampire actually aren't intentionally attacking your aura. It's mostly found in people who are naturally more down, more depressed. It's almost as if they are taking your happiness for themselves.

    You become drained because your aura and theirs are in constant battle of who will overcome the energy of the moment, and they clash. And sadly enough in some cases good will not triumph over evil, and this is why you're the one walking away tired and agitated.