Contest Question

I have several giveaways planned and wanted to poll my followers as to their entry preferences. 

• Do you like getting multiple entries for doing certain things ie. following on facebook  for 3 extra entries? 
• Do you prefer giveaways with one comment/way of entry per person?

I'd also like to know if you find a good blog or a good blog giveaway do you share it with others?

Thank you.  You're input is appreciated!