I don't have any religion... I'm my own god!
Now
that is a religion to my liking (with the appropriate indexicals switched of course...)!
1)
the idea of an afterlife
From within this life I thin kit is impossible to form an idea whatsoever of any kind of afterlife or even whether there is such a thing or not. Any kind of speculation, will necessarily remain just that: speculation. Interesting but not informative. I see no way in which a rational being can base actions in this life upon speculations over a hypothetical afterlife.
2)
the idea of something greater than oneself
I cannot logically and psycologically conceive of any idea greater than myself, since necessarily I am the one thinking it and thus, as originator and bearer, greater than the idea itself. Notice that this claim says nothing about the objective existence of an external thing without myself. No objective knowledge about such things is possible.
3)
the idea that conscious energies exist without form
Shaky ground here due to the formulation of the question. "Without form" baffles me. No material constraints? Well, energy is a state of matter (or at leats interchangeable) so energy always has a form (=structure, organization). Consciousness is an emergent property of certain complex systems, and thus dependent upon their structure and organization.
4)
the idea that truths may be found within one's self
"one's self": I do not have a self, I am a self. I'll reformulate accordingly: truth within oneself. Well, yeah, sure. What has this to do with religion though? "Nole foras ire, rede in te ipsum" St. Augustine. Don't go looking for the truth in fora, but return into yourself.
(P.S. Did you mean this in a Freudian way?)
5)
the idea that all things are connected
"What is up there is like what is down here", quite an old bit of knowledge, eh? The emerald tables ... or "Omne Omne est" like the later alchemists put it. Well, yes, of course everything is connected, in a very ordinary way. Causal influences ripple through the fabric of reality. nothing strange or mystic though, simple billard balls on a table. Gravity and light connect distant stars to our bodies, microcosmos and macrocosmos are one. You can give a very romantic, Sturm und Drang formulation to it or simply speak scientifically about universal constants and global causal effects. The language changes the facts do not. Giving it a religious tinge only clouds the understanding.
6)
the idea that you were created for some purpose and that your consiousness is connected to that purpose
Purpose presupposes a purporter. By introducing purpose at this level, you necessarily need someone/thing that gives the purpose. But like in biology we all learned that purpose, teleology, is just a usefull way of thinking about bodily finctions, even so purpose is just a complex metaphor, for evenly complex physical, physiological, psycological and sociological interactions and relations. We use a simplified, sketchy vocabulary of purposes, will, intentions etc because we do not understand or have no time to explain what the inner machinery is really doing.
BTW. I wasn't created, I grew.
7)
the idea that there may be planes of existence beyond ours?
"Planes of existence" is in dire need of an accurate definition. Like Wittgenstein thought, this is probably a problem due to obscurity in language which will dissolve, instead of getting solved, when we define the words we use: What is a "plane"? Specifically: what is a "plane of existence"? What would qualify as "beyond"?
Like always philosophy leaves us with more questions than answers...