home game blind structure?

[Balla2hot4u]

i play home games about 3 times a week and noticed that we havent been doing it right. mostly we just raise the blinds when someone is knocked out but i have always said to put time limits on the blinds.. cause when its late in the game or heads up the blinds are no where near high enough to make a difference. we usually play with about 6 players max so by the time we're heads up the blinds are only like 5-10 and we start off with about 200 in chips each! so my ? is.. whats the best blind structure to play with? every 15 min/half hour raise the blinds? and o what denominations should we raise them bye? thank you
-Adam