Nevyen, quick answer 'cause it's very easy: I use Foundry's "Mediterranean Flesh" almost exclusively these days. It gives a nicely tanned skin tone, and the three colours are usable straight from the pot. Additional highlights are put on with Foundry's "Expert Flesh D" (or any light, "Elven" skin colour). I apply a reddish wash in-between, but mostly after the four flesh colours, just for blending them all together; "Reikland Fleshshade" by Games Workshop is a good option. Bring back some highlights, perhaps adding any bone/light sand colour, and it's done.
Hope that helps. A full, illustrated tutorial is too time-consuming at the moment, unfortunately.