Create your own filter using apps such as VSCO or Afterlight , or use the same filter within Instagram. Doing so will help to make each one of your photos look like it belongs on your grid and your grid only. If you don't want to make your own, try the Preview app , which has preset filters you can pick from.Another unifying trick: Play with similar colors. "Most of my photos have a lightness, and I favor muted pastels," says Taylor Sterling, founder of lifestyle blog Glitter Guide. "However, I don't get so strict that I only do one color vibe. If you scroll down my grid, you can see transitions in the colors. Right now I have a lot of light lavender, pinks, beiges, but sometimes it will favor brown, or a lot of pink, or more bright colors."