Ok, so here we go, I will start with a personal favorite, very popular in the place where I come from...
Half a glass of Freshly squeezed orange juice
Quarter of a glass of Grapefruit soda
Red chili powder
Seasoning sauce (like this one --> http://www.mexgrocer.com/2708.html)
Salt & Pepper
1. So, first of all get a tall glass previously frozen, put some lemon on the edge, and scarch it with salt, like with the margaritas.
2. Then pour inside the glass some ice cubes, the tequila, one squeezed lemon, salt & pepper, the tabasco sauce, the seasoning sauce, and the english sauce (worcestershire). Mix with a stick, so you don't ruin the salt scarch on the top of the glass.
3. In a different recipient, mix the orange juice with the red chili powder, and blend until it becomes red and totaly mixed.
4. Pour the red orange juice until half of the tall glass, and then fill the rest with grapefruit soda.