I am a new user to premiere, mostly because every time I try to use it I find it impossible to even see what I am editing. My system runs just fine with After Effects Cs5 (which should logically be the more taxing on your system out of the two) however when I play back I get nothing but lag. I know I can render for a preview but I don't want to wait for 3 hours to get a preview for a 7 minute video (that doesn't even have any effects, just the raw, imported video.) Really, by now I am ready to just edit it in Vegas, which runs just fine (funny, considering it's way cheaper.) Is there a solution to the problem, without buying anything? If there isn't I really expected more from Adobe, maybe I'll just stick to After Effects (Which is doing Premiere's job way better.)
List out your hardware and media specs. Then we can get some idea of how things should be running for you.
As Jim says, we need more information:
What version of Premiere Pro? Have you installed the recent updates? What operating system? What kind(s) of source footage? Has this ever worked before? What other software are you running? Do you have any third-party effects or codecs installed? Tell us about your computer hardware. Are you using Mercury Playback Engine GPU Acceleration?
(Now there's a good list of standard questions for your proposed links.)