Worth checking out the Travel Advisor when planning your holiday.
Janglo have events and activities posted
The new iTravel Tel Aviv website is a useful resource.
Useful info on the Tel Aviv municipality website
Tel Aviv Guide is a popular resource
Go Tel Aviv is also worth checking out
Visit Tel Aviv also has interesting details.
Facebook:
The My Shteiblech TEL AVIV group is popular. You can also post on it.
Secret Tel Aviv is a well used Page.
The Insider Tel Aviv Page is useful if you have questions or queries.
For events in the Tel Aviv area,  check out the TLV International Page.