Web services I like:

Blogger - I use it not very often ;) but this is really cool thing.

Twitter - I was not using it for some time, but this is great solution for micro-blogging. If you want to share something small or some ideas quickly - twitter is a great tool.

Evernote - This is another great tool with nice plugins for firefox and windows mobile.

Todoist - Everyday planner that has a very simple web interface.

Dropbox - web file storage with auto syncronizations between windows and linux clients.

Other interesting links:

http://www.slideshare.net/ - SlideShare is nice site with many presentations.