I've caught myself with my pants down a time or two.. in the kitchen I mean.
Nothing like preparing a dish/dessert and you're headed to the oven to get it bakin... but you forgot to turn the damn oven on.
Something I found helpful in this small but annoying occurrence is to simply turn the oven on BROIL and HIGH. It heats up in no amount of time. After maybe 10 minutes, you can cancel that broil setting and turn it to bake and resume baking your bad ass dish.
Hope this hack helps.