It depends on which fruit you are talking about. Some, it's best not to try. Apples, for example. They have to cross-pollinate with a different variety to produce fruit and seeds. That means they do not breed true. What you usually get if you grow a tree from an apple seed is a small, twisted, warped apple good for nothing that tastes awful and is probably not very prolific. Apples are propogated by grafting.
You can grow some fruits from seed and do OK. Depending in which ones they are you might need to scarify or stratify them. Scarify is to scratch or weaken the seeds outer coating. Stratify is to keep them in cold conditions a certain amount of time, sometimes a few days in the freezer may work, sometimes several weeks in the refrigerator or freezer may be required. It depends on which seed you are trying to sprout.
If you have any specific fruit in mind somebody might be able to help, but there is no one technique that works for all fruits.