We have a "main" banking account that has savings/checking/vacation sub-accounts. This is where most of our day-to-day money flows -- paychecks deposited into savings, checks and utilities coming out of checking, and the "vacation" account just storing a small buffer that we don't actually use for vacation. The extra cash in these accounts also constitutes the bulk of our emergency fund.
We also have a couple different high(er) interest savings accounts (Capital One and Discover), one of which has maybe 4 named sub-accounts.
I'm trying to figure out a sensible approach for organizing our accounts. On one hand, it is psychologically appealing to have a bunch of specific and separate sinking funds -- for property taxes, roof replacement, vacations, etc. Somehow it's reassuring to see the $$ amounts allocated to each known future need.
On the other hand, it can be annoying to have our money spread all over the place in various institutions and sub-accounts therein. Annoying to keep track of, slightly annoying at tax time, and just...more complex than is probably necessary.
At the moment I'm leaning towards three buckets: a modest amount kept in our checking/savings for regular expenses, combining all our sinking funds into one higher-interest online savings account, and the remainder (emergency) in the other higher-interest online savings account.
I'm curious what methods others use for this sort of thing. Co-mingle? Separate accounts for each big thing? One big account and you just have slices of the pie earmarked in your head or a spreadsheet or some other application?