"Don't get demoralised due to the surveys. They should be thrown into dustbin," Digvijay told party workers at Margao.
The AICC general secretary is on a two-day visit to the coastal state ahead of Parliamentary elections.
"In year 2004, the (pre-election) surveys gave them (NDA) an upper hand. It showed India was shining, but we won with majority. Similarly, ahead of 2009 polls the surveys showed that NDA had an edge over Congress but still we formed the government," Singh said.
Digvijay said Congress "lacked" in marketing unlike other parties.
"However, it has launched an aggressive campaign to highlight the achievements of UPA government," Singh added.
