The order matters because each step supplies what the next one needs: forgiving plants survive the watering stage, watered plants produce leaves worth cooking, and cooked-from plants get pruned into the bushy shape that gives you a batch to dry. Sharing a cutting belongs last because by then you can explain the one rule that keeps a windowsill herb alive.
Step 1: Buy three forgiving herbs, not fussy ones
Pick the plants before anything else, because that choice decides whether this works at all. Basil, mint, and chives tolerate a sunny sill and irregular watering far better than rosemary, thyme, or cilantro, which sulk and die in a week. Buy plants rather than seeds if you want to cook within a month; seeds add six weeks before the first leaf is worth picking. Get three separate pots, since mint spreads aggressively and will crowd out anything sharing its soil. At the shop, check the drainage hole and lift the pot; if it feels heavy and drips, it has been overwatered and the roots may already be brown. Skip pots without holes, no matter how good they look, and skip the discounted trays of half-dead seedlings near the door.
Step 2: Put watering on a fixed reminder
Once three pots sit on the sill, the thing that kills them is not neglect but enthusiasm, and most windowsill herbs drown in the first fortnight. Set a reminder for every second or third morning and label it check, don't water. Then press a finger an inch into the soil: if it is damp, walk away. If it is dry, water until it runs out the bottom of the pot and empty the saucer underneath. South-facing sills dry out in two days in summer and seven in winter, so the calendar is only a nudge, never an instruction. Group the mint with the others if you like, but keep its pot separate. The reminder exists to make you check, not to make you pour.
Step 3: Cook three meals that need them
By this point you have living plants and a watering rhythm, so the risk shifts from killing them to admiring them. Herbs left unpruned grow tall, woody, and stingy. Cook three real meals that would be worse without them: a full handful of basil torn into a tomato pasta, mint chopped through a cucumber and yogurt salad, chives stirred into scrambled eggs after the pan comes off the heat. Pick from the top, pinching just above a pair of leaves, because that cut signals the plant to branch, which means step four will have more to work with. Never strip a stem bare. The usual slip is treating the pots as decoration and picking two leaves a week, which lets basil bolt into flower and turn bitter while the plant quietly stops producing.
Step 4: Dry a batch before it bolts
Timing matters here: dry the batch while the plants are still bushy from the pinching in step three, not after they have flowered. Cut stems mid-morning on a dry day, once any dew has lifted, and take no more than a third of each plant. Chives and mint dry well, so bundle them loosely, hang them somewhere dark and airy for a week, then crumble them into jars. Basil is the exception people get wrong. Dried basil loses almost all of its aroma within weeks, so chop it, pack it into an ice cube tray, cover with olive oil, and freeze; you get six or eight cubes that drop straight into a winter sauce. Do not dry herbs in a warm oven or a sunny window, which cooks off the oils you are trying to keep.
Step 5: Pass on a cutting and the trick
Sharing a cutting is the step that locks the habit in, because explaining the finger test out loud makes you actually follow it. Take a four-inch tip from the mint or basil, cut just below a leaf node, strip the lower leaves, and stand it in a glass of water on a bright sill; roots appear in seven to ten days, and it can go into soil once they reach an inch. Chives divide instead, so split the clump with a knife and hand over half. Tell your friend the one thing that matters: the reminder is to check the soil, not to pour. The usual failure is a woody old stem, which will sit in water and rot, or a cutting taken with flowers already on it. Pot it up, hand it over, and cut this last strip free.
A reminder on a phone vanishes the second you tap it, and a to-do app keeps no record that you checked the soil on Tuesday. A paper strip taped beside the sink does the opposite: it visibly gets shorter as you work through it, and the last line stays there until you have handed a rooted cutting to someone. Five lines, one windowsill, and a reason to keep the basil alive.