If you're at 19 or 20+ yrs, put yer papers in and PUNCH! Life is Good on the outside.
If you're at 16+ yrs, consider transferring the GI Bill to the kiddos. It can be absolutely amazing when combined with the Yellow Ribbon. Like, jaw dropping. It's a 4 yr commitment to xfer, but worth it if you want at least one kid to go to school for free.
Retirement brings steady pay, benefits, and (relative to airline plans) absurdly cheap Tricare health coverage. Many guys pay $600 or more a month for coverage with their company. That adds up.
If you're at 15 years or less, PUNCH and join a reserve/guard unit so that retired pay kicks in eventually.
YMMV. Good luck.