Winter is when we are supposed to plan our gardens. Summer is when we wish we had planned better. For some reason, that reminds me of a fountain playing blithely through a rainstorm and it always makes me smile.
Water features are decorative focal spots using water in one form or another.
What I have in mind here would generally be achievable in an afternoon, once you decide on the effect you are after. Best of all, you can enjoy a water feature in any garden, no matter how large or small. Your water feature may be as simple as a bird bath or you may step up to a half barrel water garden or a wall fountain or move on to something as exotic as a rivulet. Whatever you decide on will be just fine. The easiest way to get started is with a simple passive feature such as a bird bath.