Or, if using roller, run it _gently_ along edges.

One old trick is to barely drive long common nails into ends of
material and either set nails on ground on one end and up against wall
or whatever on the other, or let all nails sit on horses. Doing so
lets you go over all runs and drips with roller, and spread them out.

Whatever you're doing regularly, you should eventually learn to do
well.

J