r/b adn vodka, also known as a "Raging Bull" is a great 1st drink, or midway through the night drink, i wouldn't recommmend it later in the evening. at bars they usually do a standard pour of vodka, and then as much of the red bull as will fit in the glass, and then hand you the remainder of what's in the can. At home, i just mix to taste
as for e-c, I find that it helps me maintain my energy level w/o making me go crazy.