Pick the right spot
- Go far from spawn and main roads.
- Avoid biomes players travel through often.
- Never build next to your main base.
Build it right
- Go deep underground.
- Use natural blocks around the room so it blends in.
- Keep lighting inside and hide any redstone.
Don't leave a trail
Fill in tunnels behind you, don't leave boats, torches or dug paths and log in and out away from the stash.