I would begin with the way to get the most impact and that would be to do the lawn work and tree trimming. The exterior light fixtures can wait because after you replace windows, you will probably have to paint, which is a good time to change light fixtures.
So, the yard work first, followed by the windows. I say this because you are painting the inside so you may as well get the windows squared away so you can do the painting because it is likely you will have to change moldings or window sills or have painting to do after the windows are replaced.
Followed by painting the walls and lastly, the floors so they do not incur any damage from all the work.
If you are living in the home while it is being renovated, you should begin with the kitchen since you have to eat. Windows, walls, floor, appliances...in that order. I suppose you can get appliances now and just move them around as you work in the kitchen, but that often causes scrapes, dings and scratches on your new appliances to be in a construction zone.
After the kitchen, concentrate on your bedroom. Your bedroom is important because you wake up every day and go to sleep every night and a bedroom should be a place of sanctuary for you to be relaxed and calm. Wouldn't it be nice to wake up every morning and be in a lovely bedroom? It is good for the soul.
If you are putting down prefinished flooring, it is easy to do one room at a time. However, if you are sanding old flooring or laying raw wood to be finished, then it is best to do that when the house is empty BEFORE any painting work is done, then cover it with brown paper taped down so it remains fresh and clean during the painting process. I say this because dust from sanding GETS EVERYWHERE and all over your freshly painted windows and doors and walls. So, that also determines the order of scheduled work.
Of course it is ideal if you are not living in the house or just camping out in one room so you do not have to go through moving and moving and moving things around the work zones.