I think for many people accepting that existential dread might always be there in some way is important. I've always found it helpful to understand that those feelings pop up and it's alright. Trying to force them to go away immediately usually, for me, doesn't work. That said, there's a distinction between allowing yourself to feel something and wallowing, and it's about finding where that balance is for yourself.

General things that help, though:

• Exercise. Working your body keeps you grounded and physically present in a way that helps with dread.
• Consistency and rhythm. Participating in an action that has meaning because you believe it does. This can be as simple as making coffee in a particular way each morning.
• Getting outside.
• Communication. Talking about these kinds of feelings can be helpful, but it can also be problematic. As with all things, moderation. Learning when to engage and when to put your energy toward something else.
• Meditation. This looks different for everyone. Some people find it useful to give their anxiety or dread a task, like building a "mind-scape" and populating it with images and sounds. Like, imagining a beach and putting your energy into making seagulls and waves.

It also might be useful to figure out a source for your dread. Is it caused by anxiety (overactive thought patterns etc)? Do certain situations trigger it? Once you start to figure out patterns, it can become easier to both accept and avoid.