Not to saturate the senses, especially smell and taste, it is best not to taste more 5 or 6 wines. It is essential that people who go to taste to feel comfortable, take your time and can concentrate properly.
To make more dynamic the tasting, please find a topic. But that this issue not just (only red wines or white or sparkling), as this is irrelevant and often monotonous.
A good wine must have introduction, a middle and an end, so we recommend starting with whites, then reds (young, crianza, reserva and gran reserva) and eventually sparkling.