How to Deal With Major Challenges in Machine Learning

We often get blocked at different steps while working on a machine learning problem. In order to solve almost all these steps, I have listed down all the major challenges we face and steps we can take to overcome those. Data Preparation, Model Training and Model Deployment are different sub domains. I have also categorised these challenges into different sub domain for easier understanding namely Data Preparedation, Models Deployment and Models Overfitting, Data Sparsity, Data Collection, Data Analysis and Data Interpretation.