Confirm the time and platform
It's not often explicitly confirmed what platform you'll be using for the interview - each company prefers a different platform so make sure you confirm with the interviewer which one you'll be using. It's a good idea to do a test run to make sure everything is set up properly - also wise to check your screen sharing permissions in case you're asked to share your screen!
Plan for distractions
If you're living with other people, give them a heads up on what time your interview is so there's less noise in the background. Since it's not their interview and they're likely to forget, stick a note outside your room door or on the fridge as a reminder to keep the noise level down. Don't forget to close your door, any windows and put your phone on silent.. not vibrate! Vibrations can still be heard!
This isn't just about your clothes or hair, you also need to make sure the way you appear on screen looks good. When you do a test run of the platform you'll be interviewing on, play around with the lighting and space. Your face should be in the center of the screen with a minimal background (no Zoom backgrounds please!) and your face should be bright!
Do your research
Just like a face-to-face interview, you should do your homework on the company and the role. Have a few notes and questions written up on the company, and have the job description printed out or up on screen. It's important you take the responsibilities they list and have a few talking points of your own experience that can translate into the role they're advertising.
Don't fret about the connection
If you don't have a great internet connection at home, don't worry about it. You don't necessarily need to make a disclaimer at the beginning of the call but if you are having connection issues, just ask the interviewer to repeat the question. Everyone is now used to the awkward back and forth of 'can you hear me now'.
Try and keep eye contact
It's very common that when you speak you tend not to look directly at the person most the time. And that's generally fine when you're face-to-face because they'll know you're not looking at something distracting as you talk but when you're interviewing online, you'll need to try and maintain eye contact, maybe not at them but keep your general eyesight on the screen.
Highlight your remote work experience
This is super important to tell the interviewer if you have previous remote work experience. Generally in these times, companies are looking to hire people that have this experience and don't need as much help to maintain communication and general WFH best practice. No worries if you haven't had a job working remotely before but if you've worked on your own projects at home, for university or even freelance gigs, let them know! They want to make sure you won't get super distracted by things at home.