Hiking/backpacking (not exactly niche?)
- Don't buy a ton of stuff for day hikes. You need less than you think. If you carry enough for an overnight there is a good chance you'll be so slowed down that you'll end up staying overnight.
- Carry the ten essentials. GPS' run out of battery and you can end up in areas without satellite reception. Always have a compass and paper map and visualize your route before going if you are backpacking in deep. Be aware where roads and bailouts are relative to your route.
- Occasionally look behind you to get an idea of what the route back will look like if you'll be returning the same way.
- If it doesn't look like a trail, stop, you need to backtrack to the last sure spot. Don't plow ahead blindly thinking it will resolve itself.
- Winter hiking means less daylight and more stuff (slower). Plan accordingly.
- "Mountains generate their own weather". Bring some light raingear and insulation even if it is warm at the trailhead. I've started in 80+ temps and gotten snow near summits.
- Carry hiking poles. They are invaluable for things like stream crossings. They saved me from breaking a leg stepping down boulders once.
- If the trail is blazed and you can't see them look up and behind you for them, sometimes they are painted high up for snowpack.
- Carry traction (ice creepers) if going up into the mountains in spring/fall. Early/late snow and ice is common. In winter bring crampons.
- Always check the weather, especially for mountain hikes. Be ready to turn back or change your plans if the weather looks sketchy. Don't get "summit fever" just because you made a special trip.
- If you are shopping for gear spend the most on boots. They will be the major deciding factor in how comfortable your hiking is. Make sure to break them in before a trip. I've been on a multiday mountain trip where a guy had brand new boots and his feet were bleeding by day 3.
- If winter hiking and there is a snow pack wear gaiters (or built in ones). Snow in boots = cold/wet feet = frostbite. I've seen too many people have to turn around because their boots were getting packed with snow and they were suffering.