In a shot: I made a homemade meyer limoncello and used it in this month's cocktail with vodka, vanilla, powdered sugar, lemon juice and garnished it with salt preserved lemons rolled in sugar.
With the limitations on citrus, the fact that I already used grapefruit for the very popular Resolution cocktail, I decided to do a solid lemon based beverage. After making home made peppermint Schnapps for my Christmas Eve cocktail, I had began looking into making home made liqueurs. One of which was a homemade Limoncello recipe.
The first step to making good Limoncello is having a decent neutral spirit to start with. Personally, I would've used Everclear cause it's flavorless, colorless and odorless and ridiculously strong. From a marketing stand point I decided not to go with this only because it would've been off putting to some guests. So the next recommendation is to use a mid grade vodka. Save your high end stuff for Martinis. You will lose the subtleties an expensive bottle of vodka is priced at after cutting it with all the other ingredients. I used SKYY Vodka. Nothing wrong with that!