By all means, keep back a few spare bones in case you need them, but you should try to use the remainder.
By blocking off completed mine sections you avoid accidentally wandering into them again.
It's very easy to get temporarily lost underground, and to waste time wandering into areas of your mine that you have already cleared. Warning: If you take the bed with you, getting killed during the day will return you to the world's spawn point. You may be worried about mobs attacking if you place the bed outside of a shelter, but if you go to bed early enough, the light level will be such that they won't spawn at all, giving you a creeper-free day! You will also not be attacked by any phantoms as you are well-rested. Mobs spawned at night are likely to disturb and interrupt you (including killing you!), and you might overlook something important in the dark. It also resets your spawn (unless you play on hardcore). Skipping the night-time provides a significant speed-up, and is safer. When it starts getting dark, place the bed and sleep. Whenever you are active above ground (especially when away from your base mapping or otherwise covering long distances), it's worth carrying a bed with you.
These automatic systems have their own tutorials and so those details are not listed here. Mob grinders, item generators, experience farms, automatic smelting system and so on may require significant setup time, but this is soon repaid in the time savings they can provide.
HOW TO MAKE A CRAFTING TABLE IN MINECRAFT ON A LAPTOP PLUS
1.20 Lava Plus Water Makes Stone, Cobblestone and Obsidian.