1. Change your screen resolution. Making your screen horizontally wider and vertically thinner makes it way easier.
2. Put on some calming music. This is good. I have a pair of noise-cancelling headphones so I play in total silence, but chill music is good too.
3. Remember to BLINK! When I get to about 1000 I always notice that my eyes are getting tired. If you remember to blink normally you can stay focussed for longer.
4. Play with a mouse. Laptop trackpads are difficult.
Do not go gentle into that good night. Rage, rage against the dying of the light.
An arrow can only be shot by pulling it backwards. So when life is dragging you back with difficulties, it means that life's going to launch you into something great, so just focus and keep aiming. — Unknown