How are people managing to install jailbroken apps

Hey all,
how are people managing to install cydia packages? I jailbroke my phone and I've been using cyder 2 but I heard some people are using aptitude. but I can't seem to be able to use the typical apt-commands such as apt-get, etc.
Any hints?
Also can I search for packages with aptitude?
I'd appreciate it if someone could point me in the right direction.
thanks

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When it comes to finding apps

When it comes to finding apps through cydia, i have had no luck. So far, I have had people help me get apps from cydia. I know I shouldn't be saying this but, I have an app on my touch, where it will let me get any app from the appstore for free. If an iDevice is jailbroken, might as well take it's features to the max. This app is call installous.
This app called installous is fully accessible with Voiceover. This app is pretty awesome.