Habitat Food Plots
Plant oaks. Most properties managed for whitetails have some of these, but you can improve their output by thinning trees around them. If you have enough open land, by all means consider planting more oaks. Planting them in open areas rather than woods will make them magnets for old bucks when heavy mast crops they'll produce there.
No matter how small your property, it's vital to have some part of it off-limits to human activity except to retrieve a hit deer. It should have some cover, perhaps including some of your bedding areas and thermal cover sites. The rougher, thicker, and steeper the terrain, the better.
Cut trails, build travel corridors, because they will take the path of least resistance.
Water sources don't have to be big or elaborate. You can use rocks and logs to dam a small wet-weather stream. Placing water troughs, kids pools or pond liner plastic in dug out spots is another relatively easy project.