Add salt directly to yogurt container and allow to stand for approximately 10 minutes. Place sieve over deep bowl and line with square of cheesecloth. Scoop yogurt into cheesecloth. Bring corners of cheesecloth together and tie around handle of wooden spoon. Remove sieve, then place spoon handle across bowl so cheesecloth bundle hangs freely. Allow to stand at room temperature for 30 minutes. Then, pour off any liquid and reserve in refrigerator (see tip). Place bowl and wooden spoon setup in refrigerator for 24 hours.