I learned this idea in the summer last year and in fact did it last summer and now just telling you guys about it, but this is how it works in case you've never heard of it:
1. Take a hammer and clear out a patch of grass to wear you can get to dirt and make a fairly decent sized circle. (take out a circle shaped area of grass)
2. Pour sugar over the dirt and spread it out.
3. Pour salt over the sugar and dirt and spread it out.
4. Pour few drops of vanilla extract around and on the salt, sugar, and dirt.
5. Pour oats around the circle.
6. Add any lure or urine you shall wish around the lick.
It worked for me!!!