Loosing you job is not easy. You will go through a series of emotions. You will get angry, become depressed and feel guilty. However, in many cases you would have had no part in being fired. Keep a few things in mind before you hate yourself. Make sure you have a right to be heard.
You alone will know what you did and why you got fired. You should not feel guilty if you were not treated fairly. This is especially true if you had to take the blame for something someone else did. Ask yourself what you could have done to prevent being fired. If you could not do anything then stop feeling guilty or sorry for yourself.
Unless you threatened someone or assaulted someone or had stolen something you should not have been fired without a proper investigation. In fact there should be a disciplinary investigation for each charge against you but if you are the Financial Manager and you stole a million dollars then you know you are guilty and a disciplinary case will not change anything. However in cases where you were involved in smaller incidents you should demand a proper hearing and never settle for less. Keep all necessary dates and documents as proof of what happened.
You have legal rights when you are in a Labour dispute so make use of them. Once fired go online and search for help. This could include looking for cases involving the same kind of charges. Have a look at the advice given. Each case is different but every bit of advice will help you in arguing your case. Do not go to an Attorney before you made use of the institutions that regulates the Labour Industry. This will differ so make sure what regulations are applicable in your country. Use these support groups to fill in your forms and file the necessary documents. Most of the documents are easy to complete, especially in the early stages of your dispute.
Once you get over the reality that you were fired you should make yourself ready for a fight. To do this you will need to make sure you are in a good psychological condition. Secondly make sure you had a chance to tell your story and thirdly make use of the legal support available. Most of this is free. Use Expert opinion where it is needed. Before that, educate yourself first by listening to advice from people who had to deal with similar situations.