administrative meetings... with yourself.
I can relate to your situation far better than I like to admit, if you know what I mean.
Many of these issues can be addressed by making sure your inventory is current, complete, etc.
If you were to take a leisurely Weekly Review and reflect on how you spend your time, you might find that you want to spend it differently in the morning so that you don't feel like the day is wasted at night.
There are many people who have similar behavior patterns to these. I propose that it is not quite "stress-free productivity", as David Allen describes, as the "second wind" that occurs past 10 p.m. or so is often driven by anxiety about the earlier part of the day.
To get more done, you have to do less. This is a mantra worth remembering. To get more done, you have to do less... so long as they are less of the things that are not leading you in the direction you want to go. Many of us want to sail to Europe but are too busy shopping for luggage online or repacking our existing luggage more efficiently... when we can't even afford to go yet.
Many of us would do better to have a list of Next Actions (To Do's) as well as a list of NOT To-Do's.
A legitimate Weekly Review will weaken the force of habit and help re-align with overall goals, vision, etc.
In my own case, I had to set a recurring alarm for every 15 minutes, all the waking day. At the 15 minute mark, I had to write down what I was doing. Very often, I was multi-tasking or off-track from the actions that would have been more productive. I was doing a lot of things, but not the right things.