Voluntary Socialism
The ideal model that would ensure both Democracy and Socialism in equal measure in societies is Voluntary Socialism. Noam Chomsky has advocated this idea as a solution for the problem's of today's world: http://www.hindu.com/mag/2005/12/11/stories/2005121100030100.htm
The problem is to make this model a reality. A mechanism by which this can be achieved in a peaceful way, acceptable to all concerned would be through the means of Partyless Democracy. Voluntary Socialism through Partyless Democracy can be made into a reality if people are sufficiently enlightened about it.