15 types of clients, their characteristics and ways to deal with them - Wonderful World of Clients [infographic]. This is a little funny and not meant to be disrespectful. It's a good summary of how to deal well with unreasonable client demands.
These "12 Most Effective Time Management Principles" gives you actions to guarantee you are successful in the future.
There are multiple strategies to increase your productivity, such as time management, proper scheduling, and using the right resources. Productivity is also directly correlated with your mental health, stress levels, and anxiety.