1. Don't wear the same pair everyday.
2. The heat and moister from your feet can "burn" the leather, causing it to crack and shortening the life of your shoes.

3. Let shoes rest for 24 hours after wearing them, ideally with a pair of untreated wooden shoe trees, which will absorb the moister from the leather and straighten out creases. There is no need to leave the trees in, though. After 24 hours, they will be of no further benefit to your shoes.

4. Never dry leather shoes with a heat source as this dries the leather and causes cracking.
Always replace worn leather soles with new leather soles, rather than rubber ones, which don't breathe.
5. Always wear leather-soled shoes in dry weather conditions the first few times you wear them. This hardens the soles, which will help make your shoes impermeable the first time they encounter water.