Mixing can be an overwhelming task. Don't let it get too complex. When you start a mix, start simple. Do a rough mix in a short amount of time. Take the mix and listen to it for a few days. Get an idea for what you want to achieve with your mix. This will be the best approach to getting a final mix that you're very happy to put out publicly. If you really want to try and get a decent mix in a short amount of time, set a timer for 10 minutes. Mix as much as you can and when the timer goes off you stop. Repeat this as many times as you want and then take the mixes with you for a day or two. Listen to them and hear what works and what needs to change. This will train and sharpen your mixing skills to expedite your workflow and lower your stress.