Thanks for asking your question on Trulia about the best time to list.No one knows for absolute certain what the future holds. Interest rates have been incredibly low, but have ticked up a little this past week. If that trend continues, it will make it more difficult for more people to finance a home. As a rule of thumb, a 1% increase in mortgage rate equates to roughly 10% decrease in the amount of home (purchase price) a person can afford. For sellers, that means less prospective buyers for their home. No one knows what the mortgage interest rate will be in the spring; we can only speculate.
Some neighborhoods and price ranges experience more activity than others. In order to give you a quality answer to your question, I'd need to know more details about your home, its location, condition, size, price you would want to ask, how motivated you are to sell, etc. All those factors would help determine what the market is for your particular home, and help you determine if you should sell now or later.
I send my clients a monthly market analysis via email and I'd be happy to send them to you as well. Even better would be a competitive market analysis done for your own home. This would give you detailed information to help you make an informed decision.