Here's what I do:

XXX-###

Where XXX is a 3-letter room identifier and the ### is the wire number.

Make up a room identifier that's intuitive. MBD = Master Bedroom, KIT = Kitchen, etc... Keep it simple.

The number 'series' correlates to a wire type. To make it easy to remember, I start with the most common type of wire and work my way to the least common type.

100-series = category 5/6 wire
200-series = speaker wire
300-series = coax
400-series - usually ends up being a catch-all for the other types.

So, a label that says LIV-201 would be a speaker wire run that goes to the living room. BD3-104 would be the 4th cat5/6 in bedroom 3. (which implies that for a given type, I start at (for example) '101', not '100', just because if you're making numbered jumpers, you never have 'wire number zero'.)

Of course, I also have a wire list that provides additional details (namely the intended purpose for each run), but the idea is to be able to walk on a job site, look at a wire and know where it goes even if I don't have the list. It works pretty well for me.