We measure the sand in the bunker and add sand were needed, making sure there is at least 4".
We also sodded a few of the thin areas in the fairways. We have a couple areas that sit low and collect water. When we get heavy rains in the summer, these areas stay wet for a few days and with a little heat, the grass dies. We stripped these areas bare, added soil to fill in the low area, then sodded the entire spot.