Bring money. Be in a good mood. Shower after arriving.
I always showered after arriving, whether asked to or not. So during a recent visit I had showered at home 3 hours before, and the SP was eager to see me and said "don't shower". So I skipped it and hoped in bed. During the warm up I noticed a bit of body odor on my part that was making me feel funny so I broke off the LFK and said "Maybe I'll hop in the shower for a minute" and she was very quick with an enthusiastic "OK" lol. I give her credit for not saying anything after we started, but there was a big difference to me between my regular just out of the shower scent and my 3 hours ago shower scent. I didn't think there would be, as with clothes on I had no odor, but there was.