You could spend $200+ on a high tech canister stove . . . or make one from a a cat food can in a few minutes. Unless you're melting a lot of snow for water, you really don't need to boil water in three minutes.
Your trusty climbing rope has served you well, and deserves a better fate than to be cut up into dog leashes. Make a rug out of it instead.
Try this little compass hack to increase accuracy when you measure UTM coordinates. (Warning, this is for map geeks only =^)
If you have adjustable crampons, mark the most commonly used setting with a dab of fingernail polish.
Can’t reach your harness gear loops with a pack on? Solution: Add a small loop of stiff cord onto your pack straps as a convenient place to clip gear.
Your nut cleaning tool Is a crucial bit of climbing gear that you never want to drop. Here is a little DIY project that will ensure it always stays attached to you.
Lightweight gaiters often have a weak spot - the cord under your foot can easily fray and break. Replace it with a thin cable.
Are you setting up any sort of fixed rope where it might get loaded over an edge? Having some sort of protection on that spot for your rope is a Good Idea. Here's a quick way to make a DIY rope protector.
Ever drink a hot beverage out of your Jetboil pot? Yep. Ever burn your lips when you're trying to do it? Probably. Pro tip: Add a strip of duct tape onto the pot lid so you can leave that mug at home.
Got a tear in most any kind of outdoor fabric? Put away that needle and thread, and reach for the seam grip and tape.
You really want to avoid dropping your gloves on a big mountain. With this quick DIY project, you'll never have to concern yourself with this again.
Loose chalk, while a lot cheaper than a premade chalk ball, is also a big mess. But if you can get your hands on some delicate undergarments, you can easily make a homemade chalk ball on the cheap.