Im in a similar low-stress situation and I am grateful for it. I have an e-fund that can handle anything, and was from a lower income family for long enough that my natural inclination towards any impulse purchase or lifestyle creep is 'probably not'.

Aside from some fairly basic goal tracking, boring boglehead investing, and making sure nothing stupid is being transacted, I really don't do a lot and everything seems to be working. Dont @ me about my warhammer addiction though...