Prepare your boat before going to sea to stay safe.
It is a good idea to have the boat and trailer serviced annually by a reputable service agent. Should you choose to do it yourself here are some pointers.
Check battery condition and charge.
Switch on and check operation of all electrical equipment, eg navigation lights, radio, bilge pump etc.
Check registration
Top up fuel
Check safety equipment, listed in safety section
Test run the motor, ensure good water flow.
Put in the plugs.
Check access to tow point on the bow of the boat. If you need a tow the eye on the bow of the boat is by far the best place to attach the tow rope. You may have a short rope with a loop permanently attached to the eye with the loop attached on deck.