2 out of the last 3 times I was either donating blood or giving blood for a test, the persons/persons either couldnt find a suitable place to stick me or stuck me about 5 times to reach a vein. So my question is is there anyway that I can make a vein easier to locate for suitable sticking? One nurse told me that the next time I know Im going to give blood, drink plenty of water. What says you? Thanks.