Unravel threads from seams and hems to darn cloth materials
Do not wait for holes to develop
Repair where you can
Renovate where you can't
Mend all holes and tears before washing
Thin spots should be reinforced with darning
Rub gently if very dirty
Tuck in frayed edges and stitch new folds together
When patching use old material
Men used to wear detachable collars on their shirts to avoid having to wash the shirt so frequently. Now we are used to wearing something once and then being able to wash it in a washing machine and dry it quickly in a tumble dryer.
I have been slowly embroidering thrift tips into men's collars. 50 - 60 years ago women were forced to darn and mend clothes and to wash them with care to keep them going longer. In those times clothing was scarce and rationed and you just had to make do.