Strip mining tips:
If you are mining for something specific, grab an atlas and put in the thing you are looking for. Stay in the hotspots.
When you are mining and find seams in the wall, mine them out, but go ahead and stay on your path afterward.
When your atlas says you’re going out of the hotspot, mine 5 blocks over before turning around. You want 2 blocks between each of your 3x3 tunnels so you are always exposing at least one block on each side of your tunnel.
Most of that applies to Minecraft, too.
Also, I recommend this guide: [Guide] The Methodology of Mining