Rands In Repose interviews the creator of Instapaper, Marco Arment.
When asked about the early decisions he made in order to manage as a one-man shop:
The biggest design decision I’ve made is more of a continuous philosophy: do as few extremely time-consuming features as possible. As a result, Instapaper is a collection of a bunch of very easy things and only a handful of semi-hard things.
Keep it simple, iterate.