Good Euchre bidding strategy guide?
The website http://OhioEuchre.Com/ has much information on bidding strategies. Euchre is a game of chance where aggression pays off. The more you play the better you will get. Take chances! Even when you are getting euchred you're learning more about the game. 

The person that said there is little strategy to euchre is incorrect. Just play in any tournament. You'll see that the same people seem to win most of the time. I don't think they're just luckly. I think they took the time to learn the different strategies of the game