How to Decrease the Adwords bidding price?

1. Add Long Tail Keywords. ...
2. Target the keywords that have low bids. ...
3. Use Negative Keywords. ...
4. Aim for 3rd or 4th position. ...
5. Focus on the Quality Score. ...
6. Create Tightly Themed Ad Groups. ...
7. Use Ad Scheduling. ...
8. Apply Geo Targeting.

1. Add Long Tail Keywords.
2. Target the keywords that have low bids. 
3. Use Negative Keywords.
4. Aim for 3rd or 4th position.
5. Focus on the Quality Score.
6. Create Tightly Themed Ad Groups.
7. Use Ad Scheduling.
8. Apply Geo Targeting.

Always run the ads in Manual CPC. Start the bid from the minimum amount and increase it until the ad run in full throttle. If the bid is very low the ads won't run, if you start to increase the bid every 4 hrs, you can find the exact CPC where you can get more clicks. But the con is you need to spend sometime on it.