12 four-week challenge ideas to do with a friend
Four weeks is long enough to feel a difference and short enough to commit to without a second thought. These challenges all share three things: a weekly number rather than a daily streak, proof you can capture in a photo, and a finish date. Pick one each, or do the same one side by side.
Fitness and movement
Pick a number you could hit in a busy week. You can raise it next round.
- Walk 10,000 steps, 5 times a week. Proof: your step count screen.
- Run or jog 3 times a week. Proof: the distance and time from your watch or app.
- Stretch or do yoga for 15 minutes, 4 times a week. Proof: the mat with the timer showing.
- Take the stairs instead of the lift, 5 times a week. Proof: a photo from the top floor.
Learning and skills
Make each session small enough that you finish it on a tired evening.
- Practise a language for 20 minutes, 4 times a week. Proof: the finished lesson or a page of notes.
- Draw one small sketch, 3 times a week. Proof: the sketch.
- Practise an instrument for 20 minutes, 4 times a week. Proof: the page you worked on.
- Read 20 pages, 5 times a week. Proof: the page you stopped on.
Home and wellbeing
These work well when you agree exactly what ‘done’ looks like before you start.
- Cook dinner at home, 4 times a week. Proof: the plate.
- Clear one small area, 3 times a week. Proof: before and after.
- Phone out of the bedroom, 5 nights a week. Proof: the phone charging in another room.
- Write a short journal entry, 4 times a week. Proof: the page, with anything private covered.
How to choose one
Pick the challenge you already half-want to do, not the one that sounds most impressive. Then halve the number you first thought of. A challenge you finish is worth more than an ambitious one you abandon in week two.
If you both take part, you don’t need the same challenge. One of you can run while the other draws. What matters is that each of you checks the other’s proof.
When a week goes wrong
Tell your friend. Don’t send an old photo or count half a session. Four honest weeks with one short week tell you more about the habit than a padded perfect record.
At the end, talk about what made the hard week hard, and adjust the number or the timing for the next round.
Set it up on Stampable
Choose a challenge, write it as a goal with the weekly number and four weeks, and pick your friend as the witness. They sign the terms or suggest changes before it starts.
Post your photo each time, and your friend stamps it. When the four weeks end, you seal it into a board of stamped photos. It is free and works in any phone browser.