Fermentation issue.

I brewed a batch on Sunday. I'm doing a lager, so I made a started on Wednesday. Kept the starter at 53. BTW, this is my 4th lager. When i was cooling down the wort I couldn't seem to get below 75. So I racked to a carboy and placed the wort in my lager chamber to get down to low 50's. When I got the temp down I pitched the starter. One thing on this batch I didn't do is aerate the wort since I let it sit for a while in the lager chamber then just pitched. Anything I can do to get this batch started. One thing I just did was take the carboy out of the freezer to warm up a bit. Is that A good Idea or what? Now I know you can't tell active fermentation from just the airlock, but ugh!!I would feel more comfortable with some activity..

Whenever I have a slugggish start, I will put the fermenter on a towel on a smooth surface and get a good swirl going to get the yeast resuspended and add a little O2. I may do this several times in a day until I get airlock activity.

Sometimes I get instant airlock activity which tells me that it was already fermenting and the CO2 had just not begun to be released from solution.

yeah, i'd try to get some o2 in there somehow.