There are endless ways to combine color -- that's half of the fun! But, at some point you need to narrow in on a few options if you are going to make progress. When selecting a palette you want to consider the mood you want to evoke before immediately picking a color.
Some color combos are exuberant and in your face, while others recede and take a little more attention to really appreciate. Go for bright, saturated colors if you want a lively, cheerful space. Opt for more muted neutrals if you want a more calming space (and if you tire of bold colors easily).