allbluezoo has a good system and is pretty much what I do, with the exception of using paste. I use Eakin seals and really like them. Switching to convexity also stopped my leaks. I get 7-10 days with my set-up. In my testing days, I have gone as much as 12-14, but would not recommend going that long.
Make sure if you are using soap that it is not one with moisturizers in it. I use Dial. I have read others use Ivory or Neutrogena, but I have not tried any other than Dial.
I am also a firm believer in the use of heat and pressure when applying the wafer. My hairdryer is my friend in this journey, being very careful to shield my stoma. I use heat to dry my tummy, then to dry the Cavillon, then to heat the Eakin and apply it, and then heat the wafer and finally apply it. I apply firm pressure for a solid minute once I put the wafer on, pushing all around and also using my fingers to push around the stoma to make that seal tight. Then I alternate heat and pressure for a couple more minutes. Sounds like alot, but it really isn't. And, it really has helped extend my wear time which was only 2-hrs to 2 days in the beginning.
I have read that some put the Eakin and the wafer in their bra while preparing their change. Another mentioned using the heating pad for 15 minutes after her change, if she had time. I have thought of using the heating pad to warm my Eakin and wafer while I am preparing my supplies for my change. I may just do that next time and see if that works as well as the hair dryer. I would still use my dryer for drying my skin and Cavillon, though.
Good luck