1. Prevent your browser from loading flash automatically. Flash is a notorious recourse hog, and that fact is made exponentially worse under Linux (Chrome OS runs on Linux), because Adobe tends to treat Linux development as a low priority. Supposedly, Adobe is working on this problem, but for now, you might want to do this:
Go into Chrome OS settings (click on the wrench, then click on settings).
Click on “Under the Hood”.
In the privacy section, click on “Content settings…”.
Click on the “Plug-ins” tab.
Change the setting to either “Click to play” or “Block all” (I use “Click to play”, but you may have trouble with that option syncing to your desktop Chrome browser at this point).
Same first 3 steps as #1 (go to settings, then “Under the Hood”, then “Content settings…”).
Both of these options will show you a small icon in the address bar when something is blocked, and when you click on that icon, it gives you some options about what you want to do regarding the blocked content on that page.
Neither of these options will turn the CR-48 into a speed demon, but the plug-in blocking in particular is likely to improve your browsing experience tremendously.