Here are a few things you could do apart from a heathy diet and lots of water:
1) Avoid touching your face or picking on any bumps or acne – that will only aggravate the problem.
2) use a mild soap-free cleanser to cleanse your face at least 2-3 times a day.
3) Apply a mixture of turmeric and neem on the face to get rid of pimples.
4) If you have acne or very acne-prone skin then consult with a good skin clinic for monthly salicylic peels that help in unclogging your pores and prevent acne breakouts. There is Kaya Skin clinic, which offers a range of services.