For a lager yeast, set your refrigerator around 48F the night before you brew. Brew the beer, cool the wort quickly with a wort chiller down to around 78-80F. Place it in the 48 degree refrigerator for 3 hours sealed up without pitching. That should give you a decent pitching temp in the 60s. Place a bowl of sanitizer next to the fermenter in the refrigerator. Three hours later, sanitize your yeast packet, scissors, and anything that is going to contact the beer at that point. Pitch yeast, make sure the top is sanitized, and put it back on. Turn the refrigerator up to the mid 50s. If you pitch within a few hours into a container that was sealed, sanitize the shit out of everything, and cool your wort quickly so it isn't exposed as long, you will substantially reduce your risk of infection.