Hello,
In schematic editor, we often add a label on a net we just connect to a bus. When I connect a net to a bus, I used alternatively 'net' command, then 'label' command.
To optimize, I usually try to do the whole 'net' stuff, then the 'label' part. But on wide bus, it's quite challenging to do the complete 'net', without error, because we can not immediately see the net names...So on wide bus, I used alternatively 'net' command, then 'label' command.
Boring !!! 
What if, when we just end the 'net' command, if this net wire was started on a bus, or if it was ended on a bus, Eagle automatically, propose to place the corresponding label. If we don't need it, we just use the 'esc' key. If we need it, we just place it with a single click ! Eagle already know that we start or end on a bus (since it ask us witch signal to use).
So we start a net on a bus, Eagle ask witch signal, we select the signal. When we end the current net wire, the label of this wire is ready to be placed. We place the label, (or not with 'esc'). The net command is still selected, so Eagle is ready for an other net wire.
- No need to select alternatively 'net' command and 'label' command.
- No need to click on the net to define with wire to use for the label.
- No more error, because we can see the names of the wire already done.
- Really really faster !
- Easy to use.