Time save:
You can cut two rows of grass by going between 2 tiles.
The last piece of grass should be cut right as you run out of fuel in order to pick up the rake as fast as possible.
During the rake part you can wiggle left and right while to pracitcally double your hitbox size.
While planting seeds you can plant 2 rows at a time by standing between two tiles and wiggling up and down. (this works better when you are slower)