Plutio is my main app and service for project and task management in my workflow. A project management system is the first thing you want to set up to make sure you keep track of your client projects and tasks. I moved away from Asana, Basecamp, and FreeAgent since Plutio is covering all of the features from those apps. And for 30% of the previous cost!
My readers get a 10% lifetime discount
when you sign up for a free trail account. Get it here and test Plutio. (Coupon: Plu20io19