Not filling FTP information to download plugin
If you use the following code you do not need to fill in ftp information when you install a plugin or theme.
/* Sets up 'direct' method for wordpress, auto update without ftp */ define('FS_METHOD','direct');
Put the above somewhere in wp-config.php.. It is a good habit to place the code in the top of the file or just above:
/* That's all, stop editing! Happy blogging. */