Once I've accomplished a goal, I'm always looking ahead to the next. When I graduated from secondary school, I worried about what I'd do after university. And when I got my first promotion, I was already thinking about the next job title.
It's the same with writing. I'd be half-way finished my MS and feeling anxious about querying, running through pitch lines in my head and thinking about which agents to target.
Slow down, I'd tell myself as my mind skipped ahead to the next challenge to be met. Enjoy the moment, for once. Lift your head from your computer and breath in!
There's nothing wrong with now. Rejections, frustrations, food and wine cravings... they're all part of the process. And what's to say the process can't be as enjoyable as accomplishing the goal?