Lens corrections
I’m an autodidact and I figured the best way to learn is by discovering solutions to my own problems, rather than learning them from someone (probably owing to my short memory too!). Since I started photographing with my DSLR (with the zoom lenses), I noticed I have this problem with dark corners and, in case of buildings shots, curved lines. The other day I finally discovered how to fix that fairly easy: with the lens corrections feature in Lightroom (by just clicking on ‘enable profile corrections’). So many of my old pictures look much better now. Few of them below: