Reflecting on attaining a precious human life, preciousness of dharma, of ability and leisure to practice etc. helps uplift the mind, keeping your eyes slightly open may help, just let them relax into being slightly open gazing down sort of along the angle of your nose but not focusing on anything, also this short visualization may help - visualize a white lotus at heart level at center of chest, just a simple 4 petal lotus with a very bright small white light on top of the lotus about the size of a pea, stabilize that a bit especially the brightness of it and then visualize the little white light shooting up from the lotus through the top of your head and way up into space and rest in that, repeat as necessary.
To counteract excitement reflect on karma and the unsatisfactoriness of samsara, this has a tendency to depress the mind, or visualize an upside down black lotus at heart level with a small black drop on it and shoot the black drop down through your body and into the ground.
Also raising the gaze counteracts lethargy and lowering it counteracts excitement.
To counteract lethargy if meditating on a visualization raise the focus to upper part of visualization, to counteract excitement lower focus to lower part for a while.
The nonexistence of the transcendence of suffering
is what the protector of the world has taught as the transcendence
Knots tied on space
are untied by space itself.
May I never be seperated from perfect masters in all lives,
and delightfully experiencing the magnificent dharma,
completing all qualities of the stages of the paths
may I quickly attain the state of Vajradhara