After the session is done, my clothes are usually in the bathroom, so after dressing, I take out the amount I want to leave and leave it on the bathroom counter. No need to be cloak and dagger at this point, we say our goodbyes and I'm sure she will see it the next time she goes into the bathroom.
Ladies, most of the time the request is for the donation to be in an envelope and left in sight or in the bathroom. If things were great and leaving a gratuity is a possibility for me, what is your preference in handling this? Leave it discreetly in sight as well? Bring an extra envelope just in case?
Should never be expected unless for you, it was a fantastic time.
If you know in the beginning that you want to leave a nice gift like that, then I think what you stated is quite sufficient. I would definitely place it in an envelope or if you want to add a bit of sweetness, a card (now you have an envelope too *laughs*).
If it is after the fact and you want to gift your provider something, I would say check out her wishlist or see if she has an online money transfer option. However, I caution you on using some platforms like PayPal as if the transfer is suspicious, they may freeze the provider's account. In that instance, you may want to discuss it with your provider.
Ultimately, I think you are on the right track. 
LJ
is not only acceptable but even sweet when a guy is so happy with the appointment that he grabs his wallet or opens the safe and seems compelled to hand me a tip. Once we have been intimate I don't think it is necessary to be as proper with the handling of money. If I just saw it sitting in plain sight I might not even know that it is for me.
Of course tips are never expected. I don't look down on you at all if there is no tip offered. I set my fee at a level that makes me happy so no need to feel like I need more. But I do have to admit that the gesture does warm my heart..
After the session is done, my clothes are usually in the bathroom, so after dressing, I take out the amount I want to leave and leave it on the bathroom counter. No need to be cloak and dagger at this point, we say our goodbyes and I'm sure she will see it the next time she goes into the bathroom.
That works in private places (her own place, hotel) but could be a problem in a place with shared facilities (spa, AMP, shared apartment, bordello, outdoor campsite with shared latrine, ...).
To make sure that she gets the tip, palm the reward in one (let's say R) hand. As you approach her to bid her adieu, you can reach out with your other (L) hand to touch her shoulder or upper arm and slide it down towards her hand which you then grasp with your tip hand and squeeze the tip into her hand.
If you are an inveterate fist-bumper, you must strive to overcome the impulse or you will end up stiffing her the tip.
we dressed together as she was leaving also & we strolled out together. We weren't all touchy-feelly in public but when we reached my car, I grabbed a jacket which had additional funds & I palmed the funds before turning to face her. We clasped hands & kissed lightly on the lips. She received the gift.
We didn't 'plan' it... it just happened so smoothly.
There was no one close by but if anyone had observed us, it would have been a gentle parting of lovers. The would have noticed the kiss, not the hands
Was handing me the tip and telling me to enjoy a nice lunch on him. It was easy and discreet and also allowed me to express appreciation without it being awkward.
After we were done and I went to the bathroom, I came back out and he had placed a tip in one of my heels. It was discreet & yet I couldn't miss it