Here is a list of resources that will help you optimize your freelance work and improve your productivity. Please comment below if you think there is anything specific I should be adding to this list.
I am using ConvertKit for my email list and landing page. It is extremely user-friendly and subscriber-focused. After a free trial period it is $29.99 per month for up to 5,000 subscribers. For more info about ConvertKit, click here.