Say your personal energy was a dollar amount, and every activity you do spends some of that. Let's start with getting out of bed: you just spent $2. Showering is $4, brushing your teeth is another $3. Getting dressed is $3 if you're a guy, $4 if you're a gal (bras are awkward and take a lot of wiggling). You've spent $10-$11 before you've even left your bedroom.
If you've got kids, getting them up, dressed, and breakfast and lunch fixed is another $5 (when they're cooperative. If they're not, you may spend up to $15 or $20 on this). Getting your own breakfast is another $2 (but gives you back $1.50. Eventually). So, figure another $5.50 to $25 to that $10-11 you've already spent.
Getting out the door with the kids is another $1 (if they're cooperative), and then your workday starts. You'll spend something between $30-$40 at work (assuming you work full-time, and assuming lunch gives energy back--otherwise, you may spend up to $50). Your running total of energy spent is around $45-$76 by the time you've left work, picked up the kids, and gotten home.
Supper takes between $2 (takeout) and $10 (cooking for family without preplanning) to make (but again, gives back most of that). Bedtime routines take $2, if the kids don't fight, and $10 if they do. So, between $4-15, coming up to $49-$91 by the time you get the kids to bed. And then, you either do housework, or your evening is yours.
Typically, shopping takes $5-$15, depending on how much, how many people are around, and what time of day it is. Fifteen minutes of housework takes $15-$30, depending on how heavy the work is.
Even mental work takes up $5-$15. If you're a full-time teacher, you're spending $50-$75, depending on the age of your classroom. Part time, you're still spending $25 or a bit more on high energy days (like topic selection days in Freshman Composition classes).
Most people don't think about their energy budget. They start out with around $100 worth of energy when they wake up (or shortly thereafter).
Before I had kids, I typically started with around $110. Just after I had the imp, before I was
diagnosed with the hypothyroid disorder I developed post-partum, I woke
up with $85. Now, with CFS/ME? I wake up with around $40.
Energy gets budgeted very carefully. Because if I overspend, I'm dealing with $20-$30 of overdraft fees before I even get out of bed.
It sucks, but that's life.
I'm gonna finish my coffee.
28 minutes ago