ticks natural hosts are mice, deer, moose and other wildlife that lives in scrublands and mixed forests. This means optimally they will be on grass or scrub that is between mouse and moose height which, coincidentally lines up with human height. Ticks will hold on to leaves and grass with their back legs and hold their front legs outstretched. When a potential hosts passes by they will quickly climb aboard. Many ticks will climb aboard from low grass or even leaf litter which is why treating your shoes and socks works. However they can be on hanging branches or taller grass and shrubs which is why treating all your clothes with permethrin is a good idea.
Ticks do not jump run hop or make any fast movements. They are slow crawlers and do not drop out of trees onto you. They do have a very sensitive organ called a Haller's organ[0] which is an olfactory organ that can also sense humidity, C02 and Temperature.
Lyme's disease isn't the only thing you have to worry about getting from Ticks. They can also carry Tularemia fever, Powassan virus, Ehrlichiosis and Rocky Mountain spotted fever.
Ticks are resistant to cold weather but one of their primary hosts, mice, are not. So after a particularly cold winter there may be less ticks the following Summer. However, many people would say the Northeast U.S. had a long cold and snowy winter but the early and long lasting snow cover provided the mice and other subnivean zone animals with lots of cover and protection from the cold so this Summer is actually turning out to be a bad one for ticks (at least in the NE U.S.).
In our household, we do thorough tick checks on everyone after a day spent outside or in the woods. This includes meticulously checking hair and armpits and a self-check around the groin.
You can help your own property by cutting 1.5 inch PVC pipe into 3-5 inch sections and stuffing it with permethrin soaked cotton balls. Mice will use these to build nests and any ticks coming into contact with the mice will die on contact[1]
Do not get Permethrin near any invertebrates or aquatic wildlife that you do not want to kill[2]
Edit: product we use in our household which we buy at the local outdoor store but is also available online[3]
[0]https://entomologytoday.org/2018/01/16/up-close-look-tiny-se...
[1]https://www.ncbi.nlm.nih.gov/pubmed/1941927
[2]http://pmep.cce.cornell.edu/profiles/extoxnet/metiram-propox...
[3]https://sawyer.com/products/permethrin-insect-repellent-trea...