The science of manifesting takes a consistent desire to learn how your thoughts and actions are interacting with the world around you.
In order to gain success with manifesting your goals its necessary to take action to learn as much as you can about how the laws of attraction and the mind work to get you what you want.
Most times than not you like everyone else is out of alignment with your deeper desires.
It this were not the case everyone would have what they wanted more quickly.
There are a few things which keep you out of alignment from attracting what you desire most.

Fear is the number one thief in attracting your desires.
The fear that you may not get what you want can keep you in thoughts of worry and doubt.
As you worry you are aligning yourself with the state of what you do not want as most of your thoughts are going to the lack of what you desire.

Feeling undeserving - Sad as it may be many people stop the process of attraction from happening because secretly they do not believe that they are deserving of the thing they are hopping to acquire.
People give themselves all sorts of reasons and excuses as to why they should not have what it is they want.
"I don't want to be rich because it will change me.
" This is just one of the many commonly felt reasons for not manifesting more money.

Complaining - How often to you complain about the lack of what you want.
Every time you place intense thought and emotion on what you don't have you are magnetizing the very condition that you don't want.
You get more of what you focus on, including what you complain about.