1. Cycle through the Outer Hebrides.
Scottish tour company Wilderness Scotland offer a tour of the Hebrides that guides cyclists across nine islands, including Barra, North Uist, Harris, and Lewis. Or you could just head there with a bike and make it up as you go along.
2. Walk the West Highland Way.
3. Take a whale and dolphin watching trip in Torridon.
4. Spend a night wild camping.
5. Paddle the Scottish Sea Kayak Trail.
6. Get your climb on.
Scotland's mountains have some fantastic climbing routes, but it's best not to scale an icy crag on an actual mountain until you've had some training. This indoor ice climbing wall in Glasgow is a good place to start.
7. Watch ospreys on Loch Garten.
8. Hitch a ride on a dog sled.
9. Bag a Munro
10. Try your hand at land (or sand) yachting.
11. Spend a day sliding and swimming through canyons.
12. Sail around the Small Isles in a vintage yacht.
13. Take a helicopter tour of Edinburgh.
14. Hone your photography skills.
15. Hit the slopes.
You don't have to head to the Alps to go skiing or snowboarding: Glencoe, Glenshee, Aviemore, and the Cairngorms have good snow from Christmas/New Year to April. You can find out more here.
16. Take part in the Common Ridings.
17. Paddle an open canoe along Loch Ness.
18. Play a round of golf in Gourock.
19. Cruise the Crinan canal on a vintage steam boat.
20. Get an eagle-eye view of the Isle of Skye.
21. Swim with seals in the Sound of Mull.
Forget swimming with dolphins: Swimming with seals is far more fun. Gift Experience Scotland run a "seal safari" through the Sound of Mull, with time set aside to swim with the seals in a sheltered bay if you'd like to get closer.