Aneros user of about 10 years. Warning: long post ahead. Unfortunately no TL:DR. Tips and tricks section after the wall of text 🙂
While penis-centered sexuality as I learnt it as a teenager is more of a mechanical approach the joy your prostatate can give you requires a more holistic process. For me set and setting are important. Nowadays I rarely have time to use my aneros (job,kids,friends, sports … ) but when the opportunity arises the foreplay / preperation is an important part of the experience.
Throughout the day (s before) I do some PC muscle squeezes which already activate my prostate because it knows whats to come. I like to take a bath or a nice hot shower, do some hair removal around my penis, the balls and the perineum/anus (Sugaring ftw!) so everything is smooth and hairless, give myself a pedicure (soft feet feel amazing 😉 and eventually put on a jockstrap (it feels sexy and keeps the penis out of the way while the anus is accessible) and douche just for the ease of mind. Ill then go about some chores, gardenwork, go for a walk or do some yoga, sometimes with a buttplug in, sometimes without – all in the sexy anticipation of whats to come.