One useful trick I learned is to brush the lashes in the opposite direction first, so top down, bottom up – then brush as normal.
This coats both sides, helps separate the lashes, and gives the impression that they’re longer.
Also, a drop of contact fluid thins out elderly or dry mascara.
Be sure to wipe the brush on the edge of the mascara container before use, to avoid clumpy lashes and smudging as a result of too much product on the brush.
Happy, lovely lashes!