Low lying plains may become bogs and wetlands. Ice freezes in rocky cracks, splitting the rocks apart. Planets are constantly undergoing change. Mapping your planet will set the stage for the development of your world. Earth is about 70 per cent covered by water, which ensures plenty of evaporation for clouds and rainfall.
Deep oceans permit better circulation of the water, but shallow seas can be warm and life nurturing.
Something else to consider is the influence of gravity. If the mass of your world is greater than that of the earth, it will have greater gravitational forces. Gravity greater than our earth's will require more force to push mountains up. Mountains will probably not be so high as they are on earth. Rain will fall faster, and hit the ground harder.