You could always check out site forums such as Handbag.com as these offer a broad sprectrum of product advice, you can put the question ‘out there’ to a wide variety of people who would be willing to offer advice on they’re own experiences.

Alternatively, visit your local salon as many provide free advice on which products will suit your skin.
If you are in the near vaninity (London, Covent Garden), you could visit The Sanctuary Skin Spa for a skin consultation. They offer a free service if booking a treatment or if you’ve spent over £25 on skin care products. It gives you an in-depth insight into your skin as well as home care advice and a regime for you to take home.
Hope this helps!