Best practices for young marketers?

I love this field, I love my job, I need and want to do everything so I end up doing nothing? Almost like decision paralysis that lasts for days.

I've been too reliant on my 'lust' and 'love' for the job to keep myself working but I've passed the honeymoon phase now. There's so much stuff to do that I find myself unable to pick one and work at it.

What do you do? What is something you can continuously work on?

I'm doing b2b marketing for a saas startup.