Agree with Echo, it depends on what you’re trying to fix. However, you can never go wrong with getting a good sunscreen, exfoliating wash, and nightly moisturizing cream.
You should experiment with different brands and lines until you hit the perfect spot, because since everybody’s skin is different, what works for someone else, may not work for you. Along with drinking water, that completely cleared my acne. Now for even skin tone, just make sure to always apply sunscreen evenly, and don’t stay in glaring hot sunlight.