You're not having fun if you never get lost.
Put on clothes?
Build a fire?
No, that's for boy scouts, being lost isn't automatically a life or death situation. You have the gear necessary to survive on your back. Getting lost may mean a few more miles but rarely is it a disaster unless you make it one. Don't swim across an open body of water unless you know what you're doing, don't try to climb up or down a cliff, don't panic and injure yourself. Just consider it an unexpected alternative plan. Prior knowledge of the area is helpful, a GPS phone with maps us helpful, knowledge of how natural features work (water runs down stream, usually towards civilization) is helpful.
Taking a good night's rest is probably better than trying to hike out in the dark. Be very careful following a stream as stream beds can be very slippery. Being lost isn't necessarily a situation that requires a rescue, so having a Spot isn't something that you necessarily should use. Sort if like LNT, you packed your self in, you pack yourself out.