In a nutshell, the tinctures will increase the amount of use you can get from a single dose of some of the healing herbs. For your basic formula, you need to have 1 part of a dried then crushed herb and 4 parts grain alcohol. You can also LOOK at the jars during each stage to see more information about what is going on.
The following is the script I use to make the tincture. I am still playing with times to see if there is any difference, but this looks to be a good 'basic' one. Have your jar out, with the herb and alcohol already in it:
Please note the Herb Potency Sheet for more information too.