clear your cookies/cache and all that junk. also if you're using firefox/camino make sure to optimize it with pipelining and all that junk. also give Opera a try since its overall a faster browser. Stay away from Safari because eventhough its very accurate at reading code, it takes a toll on it's speed.
note to kakaze and triadone and the rest of ya: my comment about Safari is not an anti-mac slur. It goes back to Safari's usage of Konqueror's KHTML engine, and from all my experienced with Konqueror I have found it to be the slowest POS ever.