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I built a habit tracker in a weekend using nothing but an Excel formula

Life is far too hectic for me lately and I wanted to improve some things. So I built a habit tracker using some Excel magic.
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The Excel functions I use most (and why they’re so useful)

After years of wrestling with messy spreadsheets, I've discovered four Excel functions that save me hours every week by automating tedious tasks most people do manually. I stopped using VLOOKUP years ...