I specialize in spellweaving and energies, but rarely use magic. But when I do, I quickly and accurately perform it with no problems. Due to some of my latest investigations, I think you are all going about it the wrong way. Preparation may not be the answer. Trying hard to accomplish something may be the very thing throwing you off.
My new theory is this: Your mind controls your energetic flow, as well as directs it, so on so forth. Though we are talking about unseen energies, we must add a hint of science. To me, there are no chakras, psi points, so on so forth - there is just energy.
So, if you want to cast a spell, you do not have to necessarily "feel" the energy, as it is there. Simply take a deep breath, and think about what type of spell you would like to perform, the wanted outcome, and say any phrases or perform any actions you may want included, then simply will it to be. I hope I was able to assist you, as this method is not considered the proper way to have it done, but, like I previously stated, preparation and regulations may be your downfall.