I love a good BLT. It's one of those classic, easy-to-make meals, and using quality ingredients can really push it over the edge into Super Crazy Delicious Town.
Vine ripened tomatoes are always a good idea, as is good quality bread. Here, I used multigrain bread from my favorite local bakery, Shadeau Bread. I also think it's fun to use arugula or other flavorful greens in lieu of lettuce, even though it messes up the initialism.
Instead of regular mayo, I like to make my own garlic aïoli. The completely from-scratch version can be found here, or you take a short cut by mixing a good amount of fresh garlic purée into store-bought mayo.