Instead of using water to make up the liquid of my base I use home made chicken stock.
I boil up the carcass of a roast chicken, after most of the meat has come off it in a few pints of water, if I have it I add some uncooked chicken on the bone, plus a couple of whole star anise, some cinnamon bark (or quills, whatever), some peppercorns some cloves and 2 or 3 bay leaves. After 2 or 3 hours I strain off the rubbish and use the fluid for the base, making up the volume with water as required. I use about 1.8 to 2 kg of veg, so that should give an idea of how far the stock can 'stretch'.
I am now VERY sure this makes a huge difference to the finished dishes, the chicken is not concentrated enough to be noticable, but rather it contributes a subliminal 'roundness' to the result.
I had a demo in what was the Gatwick Tandoori (now: Zari) years ago, and one of the guys that ran the place as good as told me they use home made chicken stock in their base.
I tried it without and it's no where near as good!