A good place to start is to do it the old school way, smoke one pipe a day, all day ( probided you wait about an hour after each smoke) and then let it rest 7 days, this means you have one pipe per every day of the week.
This will keep your pipes in very good working condition, it is not the do all end all, you can have more or less than 7 (around here its more often 'more')
My pipe mentor always tells me to build a collection of 30 pipes i regularly smoke, one for each day of the month, while this may seem like alot, it probably is a good goal, the key is pipes you regularly smoke, its common to have pipes you never pick up
This will keep your pipes in very good working condition, it is not the do all end all, you can have more or less than 7 (around here its more often 'more')
My pipe mentor always tells me to build a collection of 30 pipes i regularly smoke, one for each day of the month, while this may seem like alot, it probably is a good goal, the key is pipes you regularly smoke, its common to have pipes you never pick up