You should able to identify the circumstances behind your data loss to be able to plan your next steps with attempting to recover it. Depending on the circumstances, data recovery can be an easy or a longer more drawn out process. More extreme cases of data loss can become pricey during the recovery phase, while less extreme cases can be more moderately priced.
In order to get the most out of your recovery efforts and not break the bank doing it, one should also familiarize themselves with the recovery process as a whole.
Infographic by: www.securedatarecovery.com