Mixers and Garnishes
When you go to stock your home bar, you're not going to stock everything that is stocked in a standard bar. Rather, you'll need to minimize your stock (and thereby your cost and storage space) while maximizing your impact. However, it's not always entirely clear what the most important mixers and garnishes are, so this guide will help you determine what's best for you and your usual crowd.
The good news for mixers is that many of these are things that you can stock in your fridge and use on a day to day basis outside of drinking alcohol. Milk, orange juice, cranberry juice, and grapefruit juice are all easy to use as part of your breakfast, lunch, and dinner, so there's no worry in stocking them. Other fruit drinks to consider for your mixers and garnishes collection are pineapple juice and tomato juice.
Beyond fruit juice, there are other mixers and toppers you'll want to keep around. Sour mix, lime juice (I prefer Rosa's Sweetened Lime myself), and grenadine are all an important part of the picture. Coffee and half and half are also used for many beverages, so keeping them as part of your mixers and garnishes collection is advisable, even if you're not much of a coffee person. Club soda and ginger ale are the major items from the soda department that you'll want.
As for garnishes, lemons and limes, oranges, olives, sugar, and salt (especially margarita salt) are the most important items to have. If you have at least these mixers and garnishes, assuming you've also done a good job stocking your liquor cabinet, you should be an absolute hit.
Resources for Unique drink garnishes, Mimosa bonsai and Mimosa recipe