WordPress memory exhausted errors

Of late, WordPress has been giving me “memory exhausted” errors like this, on and off, whenever I uploaded images. Fatal error: Allowed memory size of 73400320 bytes exhausted (tried to allocate 1 bytes) in /home/thebears/public_html/wp-includes/functions.php on line 1453 Today it finally broke on me on my admin pages, and I could hardly change any settings. [...]