Ah Sharon ... the ultimate dilemma. When you're good at what you do and have a wonderful attitude ... everyone knows it, and keeps coming back to you for more and more. It's a wonderful thing, but your plate can sure pile up fast.
I've had to tackle this from a management point of view, and also from my own work angle years ago. You've got a great attitude, and you want to train others, and that's the best place to start.
The scariest thing I've found for others is their fear of becoming "dispensible". I've spent the last three years passionately training all my staff on the rewards of training others and becoming "dispensible". I never want any of them to leave mind you, and they know that (I love the group I work with) ... but when vacations roll around, we can finally all now breathe a sigh of relief knowing that certain areas don't come to a complete standstill anymore.
I had one situation where a certain position had never been properly documented, and then "poof" 2 weeks notice was given. There was no way we could hire anyone quickly enough to have her train them. I almost had a heart attack. Thankfully, I asked her if she'd mind if I brought in my video camera, and wanted to record her over the next week as I sat with her off and on, reviewing all her tasks as she performed them. We even did a "tour" of her office, reviewing all the file cabinets, everything in folders, taling about it as we taped, where everything was, typical procedures etc. It gave me the opportunity to learn areas of my own business that even I hadn't followed. I took it home and played it back, typing up over 37 pages of helptext from it in total.
By the time the new person started, we were confident that we'd covered the majority of tasks, and the new person fit in beautifully. She pulls up the helptext document, performs a search on a word/task, and up pops the words, directly from the words of the person who performed the task previously. It's been invaluable!
A few minutes of training and documentation saves weeks of agony for everyone involved. I've already begun to plan to implement the video/tape concept in a few more areas to ensure I have no surprises, it was just so easy to do. Everyone's behind it 100%, and I've noticed that the office morale has increased equally. They all still know that they're the best at what they do, but they like to go on vacation without feeling that they're going to come back to a ton of work just piling up.
It's taken me a long time to get there, but I've come to realize that making "myself" dispensible has given me the greatest reward too --- I finally have had a few vacations, and the staff loved taking over and did it beautifully!