Active morning and dull evening :(

In the morning, when I do my morning tasks, very often many ideas about what to do visit me. Like, it's the time to write to someone - I should ask the gardener about some tree in our garden - I'll clear the old cardboards in the shed - I find a good motif to draw, etc. Oh yes, each idea seems to be quite good and reasonable, I'll do them on the coming weekend, or in the evening...

Then I left home to the office, work in the office for 8 hours, come home in the evening and have supper. After I clear the table of supper usually I have 1 or 2 hour free time before going to bed. But, at that time in the evening every tasks seem to be very troublesome, I just sit on an armchair with a book. On weekend I'm rather busy with the ordinary houseworks, or weeding garden etc, seldom do the tasks I have thought of on workday mornings. Every task which has come to my mind remains undone, my to-do list never gets shorter. This depresses me every night... :(

This is because just I'm lazy? Yes. Or, because I'm too tired in the evening? Yes it might be. But also...
In the morning I’m busy with such ordinary and tribial tasks like feeding Krurun and cleaning her toilet, making my packed lunch, packing up trash to take them out, changeing the clothes and putting on makeup etc, this busyness might make my head work. But in the office... during these 2 weeks my job has been quite dull, often I find I have nothing to do - at least no interesting nor meaninful tasks :( But I can't go out or read books in the office, have to pretend to work thus I just look at the computer screen, browsing the websites meaninglessly X( Such useless, dull hours surely make my brain foggy, deaden my energy to do the things I should do. Maybe if I get busy with my job in the office, I would become more active after work? I'm not sure...