Caution
A shelf has come away from the wall, or is sagging with the fixings visibly pulling out of the plaster.
Low risk
A door catches on the frame or the carpet, has to be shoved to close, or drags open on its own.
A tap keeps dripping after it is turned off, or drips faster the tighter you turn it.
The key needs wiggling, jiggling or real force to turn, and the lock is getting worse rather than better.
A handle wobbles, droops, or turns without pulling the latch back so the door will not open or will not stay shut.
High risk
A wall-mounted television or a heavy mirror has tilted, moved, or opened a gap behind its bracket.
A curtain pole or blind bracket has come away above the window, taking a lump of plaster with it.
The seat slides sideways or rocks when you sit on it, and tightening it only holds for a week.
The gate has dropped on the latch side, catches on the path, or has to be lifted before it will close.
A wardrobe, chest or bookcase rocks, leans, or has joints that keep working loose however often they are tightened.
Describe the job and get a fixed price from a local handyman.