if possible, take your photos straight-on, completely perpendicular to your subject surface. Use a tripod with a level. Also, if you’re capturing tiling textures like bricks or…well…tile, you can save yourself some photoshop time by ‘squaring’ things up in frame when you take the photo. it sounds like some real derpy advice, but you’d be surprised how many textures i find that aren’t straight or taken at funky angles. You can often fix it with photoshop but i find it looks better if you just take a better shot to begin with.
By the way, i spelled “perpendicular” correctly on my first try. i’m so proud of myself.
-Kawai Tei-