just the horizon? with foreground? with hdb blocks in front of the sun?
it depends on what sort of pictures you want from the sunset - if you shoot wider scenes you will tend to have a chance of requiring something like a gnd filter to hold back the sky so that your foreground can be seen.
frankly speaking, tripod is almost always needed for sunset photography, unless you just take the yolk (if it is exposed).
lastly, why are people always obsessed with the silly sun when it comes to sunsets? i know it is beautiful and all, but sometimes it is the least beautiful part of the entire scene.
A good composition is essential in taking a good sunset photograph. try different framings, tight & wide. u may want to experiment manual mode & see the different effects of varying the aperture & shutter.
the rest, color enhancement & so on can be refined in PS. alternatively, u may get color filters or ND filters to add to ur lens.