Note: wget is not exists in Leopard,  you should set up an alias for wget to curl -O which does exactly the same thing:

echo 'alias wget="curl -O"' >> ~/.bash_profile

Your are done. Now just easy to use in Terminal. Here example to download iTunes.
wget http://appldnld.apple.com.edgesuite.net/content.info.apple.com/iTunes9/061-7203.20100330.XswP8/iTunes9.1.dmg

Curl is better than wget for the following reasons:

• Uses libcurl a cross platform library
• curl sends more stuff to stdout and reads more from stdin
• curl supports ftp, ftps, http, https, scp sftp, tftp, telnet, dict, ldap and ldaps while wget
• supports only http, https and ftp
• curl has ssl support
• libcurl supports more http authentication methods
• Curl is bidirectional while wget offers http post support only
• Curl has more development activities.

In fact, curl offers substantially better download statistics during
interactive use. It also has th excellent libCURL, which programs in the
operating system leverage as a transport layer. This is simply not
possible using wget, and writing an HTTP 1.1 client is pointless when a
really good one is already available.

Anything you can do with wget you can do with curl (with a little effort),
but no amount of effort will result in a well-factored libWGET. You can
(and I have) implemented recursive retrieval by passing the output of curl
through a sed script to find tags and download the target with more
curl invocations.

A wget replacement for MAC OS X is a post from: My MacOS X

First Way “create a new admin account”

1. Reboot
2. Hold apple + s down after you hear the chime.
3. When you get text prompt enter in these terminal commands to create a brand new admin account (hitting return after each line):
   • mount -uw /
   • rm /var/db/.AppleSetupDone
   • shutdown -h now
4. After rebooting you should have a brand new admin account. When you login as the new admin you can simply delete the old one and you’re good to go again!

Second way “Resetting or changing your existing password”

If you’ve ever forgotten your user account password in OS X, All you need is to remember your username (you do remember that, right?) and then reboot your computer.

1. Hold apple + s down after you hear the chime.
2. sh /etc/rc
3. passwd yourusername
4. reboot

P.S. The only major downside to resetting your password this way is that you’ll lose all keychain passwords,

How do I reset my Mac OS X admin root password without an CD/DVD? is a post from: My MacOS X

This can go in your .vimrc or in a global location such as /usr/share/vim/vimrc.
I would be interested in what other command line and vim users do to improve Snow Leopard.

step 1. Add following code to /usr/share/vim/vimrc

set nocompatible " Use Vim defaults
set bs=2 " backspacing over everything in insert mode
set ai " Auto indenting
set history=100 " keep 100 lines of history
set ruler " show the cursor position

set viminfo='20,\"200 " keep a .viminfo file

syntax on " syntax highlighting
set hlsearch " highlight the last searched term

filetype plugin on " use the file type plugins

" When editing a file, always jump to the last cursor position
autocmd BufReadPost *
\ if ! exists("g:leave_my_cursor_position_alone") |
\ if line("'\"") > 0 && line ("'\"") <= line("$") |
\ exe "normal g'\"" |
\ endif |
\ endif

step 2. Make alias vi = vim

open ~/.bash_profile and add following code

alias vi=vim

VIM: Making it Work on Leopard is a post from: My MacOS X

However, the VNC service occasionally crashes, and locks my session. It also refuses any more VNC logins. This is particularly frustrating when I am off site! Apple has analyzed this and has no explanation or fix.

Here solution howto fix it: If SSH access is enabled on the server, you can connect to the server via an SSH client  and run this command:

sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -restart -agent

You must log in with admin rights, and must enter the admin password again to run the command. It can take a minute to run. After it finishes you’ll able to login again via VNC.

You can play with remotely once you kickstart ARD
http://support.apple.com/kb/HT2370?viewlocale=en_US

Restart VNC service REMOTELY! is a post from: My MacOS X

The following ipfw rules will limit connections from Mac to ISP’s mail server to 100K per second only for outgoing smtp connections:

sudo ipfw pipe 1 config bw 100Kbit/s
sudo ipfw pipe 1 tcp from me to smtp.west.cox.net 25

Obviously, the rate can be tailored to anything you like, and the rule is specific enough not to get in the way of any other connections going on.
to remove the pipe from the port

sudo ipfw delete 1

Another example could be for webdevelopers

You should see how long it takes modern sites to load on 56k…

Create a pipe that only allows up to 15KB/s

sudo ipfw pipe 1 config bw 15KByte/s

Attach that pipe to the outgoing traffic on port 80

sudo ipfw add 1 pipe 1 src-port 80

Delete the pipe when finished

sudo ipfw delete 1

Bandwidth Throttling is a post from: My MacOS X

Here are some very useful terminal commands and tips for hidden Mac OS X settings.

All subjects

• Finder
• Dock
• Spaces
• Desktop
• Time Machine
• Spotlight
• ISO CD/DVD
• Remote Desktop
• Network
• System commands
• Applications and processes
• Files management

The best collection of handy Terminal Commands for Leopard Tweaking is a post from: My MacOS X

To stop that from happening, open Terminal and run these two commands:

defaults write com.apple.dock wvous-show-windows-in-other-spaces -bool FALSE
killall Dock

From now on, Exposés Application Windows mode will only show windows in the current Space.

To reverse this hint, use

defaults delete com.apple.dock wvous-show-windows-in-other-spaces
killall Dock

Source: mymacosx

Only show windows from current Space in Exposé System 10.6 is a post from: My MacOS X

Click the top “split” button or press Command+D shortcut and now you’ve got your window split into two usable panes like so:
To collapse the window press Command+Shift+D

ALso, you can do multiple splits. Aside from general speed increase I think split pane in Terminal is my new favorite feature.

See the Terminal Splits Windows Movie:

Terminal Split Windows in Snow Leopard 10.6 is a post from: My MacOS X