Log in or sign up?
"Sometimes I put my log in information into the register fields." "Me too! I hate that not only do I feel stupid, I have to retype everything again." For one of my side projects, Leafy Chat, we have just added the concept of user accounts. This includes the need for registration and log in (as well as log out and forgot password and so on). Leafy Chat only requires an email address and a password for both registration and log in, so it would be great to have some clever way to have both forms on the homepage. Some things...
Best Screen Resolution to Design Websites
There's no one best screen size to design for. Websites should transform responsively and fast at all screen resolutions on different browsers and platforms. Accessible. Mobile-friendly. Design for your audience, first. Design from 360x640 through 1920x1080.