It's interesting to see I am more active after lunch towards the end of the week and the opposite during the start of the week.
You can get your punchcard at:
https://github.com/USERNAME/REPO_NAME/graphs/punch_card
I have the habit of opening things in tabs and then leaving them sort of hang around if I know I am going to need them in the next hour, day or week or so. I usually have around 50 tabs open at any given time. The problem is that this makes working with Chrome very painful. My definition of painful is: very slow to load pages, very slow to click to existing tabs, insane memory usage, unresponsive at some points.
In my limited knowledge of modern browser internals, I would assume that in the current age and technology, this would not be an issue. I know that Chrome for example compartmentalizes tabs as individual processes and thus the crashing of one tab does not affect the other.
I would also like to point out that when I state 50 tabs, I do not mean 50 tabs of animated flash smileys but just your normal average day to day working material. Flash is usually the culprit and requires killing from time to time on the Chrome task manager. That being said, they have a healthy mix of Flash, js etc. I have 8GB of ram and run Mac OS X 10.6.4