I'm in the same boat, I've had too many extended vacations at home where I start with big goals and end up accomplishing very little.

I will say exercise is important for anyone. It's hard to start but if you can get into a routine of working out a set number of days a week it gets easier over time. Like a habit after a certain point. Also I tend to feel better physically and emotionally when I'm exercising somewhat regularly.

As far as accomplishing goals idk man I'm a bad procrastinator so I'll keep pushing things off until my vacation is over. I guess its best to write a list of what you would realistically like to accomplish during your break. And start on something the first day or two of vacation, unless you have travel plans or something.