Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Suggest 5 practices to prepare data for machine learning.

### Input:
none

### Response:
1. Understand and explore the data
2. Handle missing data
3. Scale and normalize the data
4. Split the data into train and test sets
5. Reshape the data