I often find that my wand arm grows tired after practicing magic. Is there something wrong with my wand, or is it just me? What should I do?
Weary Wand Waver
A wizard is usually fit to monitor his own level of exertion... I see no indication of a problem with your wand, though perhaps you are over-exerting yourself in your practice. There are a number of exercises I would recommend that will keep your wand arm fit to flex, and a number of positions or methods which will keep the arm fairly healthy even when taut. Try practicing with your wand once it's had a density incremental spell put on it - I recommend dealing with 3x or 4x the weight of your wand, in short, quick bursts. Within weeks you will find your normal, unweighted wand, a pleasure to wield in comparison, and you'll have trained your body to handle the strain that can be, at times, complex combative magic.
The Fat Friar told me that Umbridge tried to get back into his [Dumbledore's] office last night after they'd searched the castle and the grounds for him. Couldn't get past the gargoyle. The Head's office has sealed itself against her. Apparenly she had a right little tantrum...
Ernie Macmillan Order of the Phoenix, Chapter 28, Page 625
Peeves was never a living person. He is not a ghost but an indestructible spirit of chaos, who can unscrew chandeliers, throw walking sticks and generally cause mayhem.