Well first of all...Are you getting enough sleep -- if you're not, there you go.
You mentioned in another post that you have problems or issues with your sleep schedule.
Switch to a high protein diet. protein is brain food. consider drinking whey protein milk shakes. -- carbohydrates and junk food and baked goods all will make you feel bogged down.
those starbucks frappa crappa whatevers kind of have high sugar content too.
give up soda, if you currently drink that.
I have a pair of 30lb dumbbells next to my desk/computer...I often do a variety of excercises with those. and i have a massage table too, which i use as my bed...great firm surface for situps and ab exercises.
And last but not least...Trading IS boring. so Naturally you will feel sleepy. you just sit like a sloth watching/waiting/timing that chart movement,

looking and feeling like a zombie,
You can't have it both ways in life. Adapt to the lesser of the two semi-pleasant things.
When I first started out trading...I would sometimes lay in bed...just staring at the screen while listening to music or watching a movie...And I would fall asleep, and suffer a sour loss by the time I woke up,
You kind of remind me of a movie quote...from the movie Boiler Room 2000....'don't pitch the bitch...they always complain...you'll never hear the end of it.'
Good trading,
May the Farce be with you, ET extraterrestrials