If you want to fly using trim alone, there is a caveat. Depending on what *exactly* happened, and the *exact* layout of your trim tabs vs. the control surfaces, the trim *might* work in reverse.
If the control cables have broken, leaving the elevator to free-float in the wind, trim will work conventionally: If you move the trim wheel down, the trim tab moves up, pushing the trailing edge of the elevator down. This will deflect the air over the tail downwards, leading to a pitch down.
But if the elevator on for instance a PA-28 somehow got jammed and won't move anymore, then the trim tab becomes the only elevator you have left and it works in the reverse sense, e.g. trim down to go up.
And of course, in the latter scenario, your trim tab is only a very, very small elevator. At low speeds you might not have enough authority to prevent pitch up or pitch down. It might be a good idea to do a low-speed handing test at altitude before committing to landing, and use the time to rearrange the CoG in the aircraft if necessary.