1) Choose base vodka: use a neutral 40% ABV (80 proof) vodka for a clean canvas; higher ABV (e.g., 100 proof) extracts flavors faster and preserves better. 2) Choose flavoring & quantity guidelines for one 750 ml bottle: fruits 4–8 oz (weight), fresh herbs 1–2 oz (packed), whole spices 1–2 teaspoons, vanilla 1 split bean. Avoid citrus pith (bitter) — use zest only. 3) Prepare ingredients: wash produce, peel or zest citrus (no white pith), lightly bruise herbs or crush spices to release oils. Chop firm fruits into ½–1" pieces. 4) Combine: place flavoring in a clean, airtight jar or the empty vodka bottle and pour vodka over until fully submerged. Leave ~1/2–1" headspace. 5) Label jar with date and contents. Store in a cool, dark place. Gently invert or swirl once daily for the first 3–5 days to aid extraction. 6) Monitor and taste: sample daily or every 2–3 days. Typical infusion times: delicate herbs or citrus zest 24–72 hours; berries, stone fruit, or root spices 3–7 days; vanilla or dense spices 1–3 weeks. Stop when desired intensity is reached. 7) Strain: decant through a fine mesh sieve lined with cheesecloth or a coffee filter into a clean bottle. For clear results, filter twice (first through sieve, then through a paper filter). 8) Optional finishing: if you want sweetness, add simple syrup to taste (start with 10–20 ml per 750 ml and increase gradually). Re-bottle, label with flavor and date. 9) Use: serve straight chilled, in cocktails, or mixed. Keep track of tasting notes for future batches.