The safety clause is spot on

I want to share with you all some things I know about this.Eilana wrote:daily manifestation exercise
In my field of work (psionics) we know this things as "thought-forms" and basically they are clumps of psychic energy that can make things happen.
You can program them to do things for you, you can send them whenever you want and you can even name them so you can work with them for a long time.
When you are creating a thought-form it's quite important to give it just one specific purpose. If you program it to do many things it doesn't have coherence and it will do nothing.
Also, because of this 'coherence' stuff you need to be extra concentrated when doing one, because if an intromisive idea gets in your mind when you are creating it you can get an useless clump fo energy.
I think that last is one of the top reasons a thought-form doesn't work.
I personally preferer to name them and not to send them to the universe because that way I can contact them and give them a charge every now and them to make sure they fulfill their task.
One of the coolest thing of them is that since you can give them whatever form you want (as Eilana said) you can play with them and make them do any kind of things.
For example, you could create one with the shape of a satellite and position in Earth's orbit so it broadcasts a message to all the world ("buy my products"

By the way, I recomend you to always fill it with the energy of the universe and not with your own energy. Depending of its purpose it can backfire pretty bad.