Tip 4: Use Smart Filters
(Click for a full-res image)
Filters normally can’t be revisited and reworked. But if you turn a layer into a Smart Object, you can use a Smart Filter on it and readjust it. With your layer selected, go to Layer > Smart Object > Convert to Smart Objects. An icon will appear in the lower right corner of the layer thumbnail. Add a filter, such as Smart Sharpen, as usual. After you click OK, a Smart Filters layer will appear under the layer you worked on. Double-click it at any time to readjust your filter.