Especially in the beginning the biggest thing about noogling is consistency. There is no time better than another, you need to try to do it every single day for at least 30 minutes if not more. Also doing multiple sessions throughout the day seems to work better for some, like say 30-60 minutes in the morning before you start your day, then maybe another session in the afternoon if possible, and/or another session before you go to bed. Some even snoogle, which is noogling while you sleep, but once you get into the larger size domes like the XL's it's hard to snoogle as most cannot tolerate the pressure for more than maybe a few hours at a time, very few can probably do it throughout the night. The main thing is you need to find what works best for you, then keep it up until you stall (if you do), then change things up till it gets going again, then keep that routine up, and just keep the faith and don't give up and one day you'll be able to say "holy crap, they're huge!" Some have fast results, and some don't, so don't be disappointed if you don't see anything for a while, took me 11 months before there was any noticeable/measurable growth. It's a long term commitment, but in the end it's worth it because they'll be natural, and all you!