Practice labs for the CCNA / CCENT

in CCNA & CCENT
Anyone know of a good place to get practice labs for the CCENT/CCNA to practice with routers/switches? I am getting to point of feeling overwhelmed by all the commands 
On an off question, how on earth do you guys memorize these sometimes obscure commands? I know that some of you are Cisco nerd-geniuses and it blows my mind how well you know the commands.

On an off question, how on earth do you guys memorize these sometimes obscure commands? I know that some of you are Cisco nerd-geniuses and it blows my mind how well you know the commands.
Comments
Usually I just copy lab examples from books/videos, or try and make up my own. As far as remembering commands its kinda hard at first but the question mark is your friend!
http://netadminstudents.zxq.net/phpBB3/
HTC students encouraged to join
Lab Practice and Repetition -- for the stuff you should know for the exam(s).
And in real life for the really obscure options you check the Cisco Configuration Guides or Command References -- if the ? doesn't help with what an option really is or does.
Thanks Mike, sometimes it's a little discouraging when I see massive amount of commands I need to memorize. Especially since I don't want to just pass, but actually know the stuff.
Does anyone think CBT Nuggets is worth it for the CCNA exam?
I also thought the same thing as you in regards to the commands. There REALLY are so many commands. Especially once you get past the CCNA and start moving toward the CCNP like I am. Then you have more commands on top of the ones you already learned, to do with Switching (BCMSN), routing (BSCI), and I haven't even made it to the ONT or ISCW yet. But, the real key is, practice, practice, lab, lab, lab. The more you use the commands the more they will stick. Chances are you're never going to remember "every single command." But, that's why we have IOS help! You can start the command use the ? and then fill in the gaps. Once you see the part you may have missed it will come back and you will be like, "Oh yeah that's how I do it again."
Don't you have to be a student to get Packet Tracer? If so, no I do not have a copy, and won't be able to get one.
A.S Network Administration
Racks are nice.. Cisco ones that is... LOL