Others


Update Prebindings - Prebindings allow applications to launch faster. With 10.4 your prebindings are updated every time you run an Apple Installer. 

Verify Preference Files
Sometimes Preferences Files (.plist) become corrupt. You should verify your preferences whenever your applications unexpectly quit or something crashes.

Repair Permissions
Most users of Mac OS X have not intentionally modified privileges and simply need a utility to reset system privileges to their correct default values.
Mac OS X incorporates a subsystem based on a UNIX-style operating system that uses permissions in the file system. Every file and folder on your hard disk has an associated set of permissions that determines who can read, write to, or execute it. Using the AppleWorks application and one of its documents as an example, this is what the permissions mean:
        Read (r--)
You can open an AppleWorks document if you have the read permission for it.

        Write (-w-)
You can save changes to an AppleWorks document if you have the write permission for it.

        Execute (--x)
You can open the AppleWorks application if you have the execute permission for it.

Also note that you must have execute permission for any folder that you can open; thus File Sharing requires execute permission set for other, world, and everyone for the ~/Public folder, while Web Sharing requires the same setting for the ~/Sites folder.

When you can do all three, you have "rwx" permission. Permissions for a folder behave similarly. With read-only permission to a folder containing documents, you can open and read documents but not save changes or add new documents to the folder. Read-only (r--) permission is common for sharing files with guest access, for example.
Owner, Group, Others
Abbreviations like "rwx" and "r-x" describe the permission for one user or entity. The permissions set for each file or folder defines access for three entities: owner, group, and others.
        Owner - The owner is most often the user who created the file. Almost all files and folders in your home directory will have your username listed as the owner.
        Group - Admin users are members of the groups called "staff" and "admin". The super user "root" is a member of these and several other groups. Non-admin users are members of "staff" only. Typically, all files and folders are assigned to either "staff," "admin," or "wheel".
        Others - Others refers to all other users that are not the owner or part of the group for a file or folder.
Since each entity has its own permission, an example of a complete permission set could look like "-rwxrw-r--". The leading hyphen designates that the item is a file and not a folder. Folder privileges appear with leading "d," such as "drwxrw-r--". The "d" stands for directory, which is what a folder represents. Figure 2, below, depicts how this looks in the Terminal application.

Spotlight Indexing Process
Rebuild Spotlight Index    
Spotlight Index Optimization
If the culprit is something named "mds" or "mdimport" (the processes that handle Spotlight data), it could signal corruption of your Spotlight database. (Make sure that you aren't just seeing normal Spotlight indexing. See if this problem perseveres after your computer has been left on all day.) If this problem persists, you can easily rebuild your Spotlight database by opening System Preferences, choose the Spotlight panel, click on the Privacy tab, and drag your main drive's icon into the Privacy window. Now highlight your hard drive's icon within the Privacy window and 
click on the "-" button (that is, the minus button in the Privacy Window). 
Clear Caches
Even though running the routine maintenance scripts clears out some temporary files, none of the system caches are touched by them. So it is a good idea to occasionally also use a utility that trashes the system caches, and occasionally your Internet browser caches. Deleting caches won't hurt anything. However, over time a cache speeds up your computer (assuming that you do some things repetitively), so if you aren't experiencing any problems, you may want to leave your caches alone. On the other hand, if it has been ages since you have flushed your caches, or if your computer is running slowly, or if you are experiencing odd problems, it might be a good idea to flush them. Use your discretion