When you are surfing the mighty web, you often see several things you would like to remember so you can look them up in more detail later, or stuff you've been looking for but you don't want to be distraced from your current search path - so you need something to take notes. So what do you use ? Google's notebook has improved since it saw the light for the first time - and of you use Google to search you'll see it behind every search result as a link (note this). Zoho has released it's notebook in the wild recently - it is an impressive one but it has loads of features and that might not always be what you want.
There's a lot out there you can use. Although it's interface is somewhat lowtech, I still use Google Notebook, as integratio with other google tools is automatic. So my guess it the key to what you use is in there. Not really in the best features, but in the best integration with other tools you use. Right ?