I think you mean "successful", which is what you are when you achieve a goal you (or someone you report to) set for you. 
I've used listing automation since 1997, when I first realized that I wanted to do more online than just post a few knick knacks from time to time. I knew that if I was going to grow, to be more efficient, I was going to have to automate, and automate as much as possible for as low a cost as I could achieve.
My solution for the past couple of years now has been SixBit - a complete online sales management software desktop applicate built on an SQL database (power) and created by the same team that created the software I've used since 1997 (experience/talent).
ANY new tool will cost you time to learn... but the savings after the education are what you need to look for. The savings come from not leaving things out (things that you then have to spend time/effort to fix). The savings come from the enforced organization that having a regular routine creates (when you now A-B-C works better than B-D-A-C, you tend to stick with what works better). The savings come from NOT having to do certain things, knowing that your automated assistant is doing them for you (tracking payments anyone?). The savings come from being able to do things fee-free that others pay for (SixBit's build in scheduled postings save me 10 cents per scheduled listing). The savings come from you automation "having your back" when unexpected things happen (SixBit's agent starts running when Windows does - whether you log in or not, and that means you're updated even after MS Update Tuesday reboots your machine at 2am).
When I was volume selling (closed the business in 2008 - long story), I was posting well over 1000 listings a month, 15 a day for new, never posted before stock, and the balance in reposting of ending listings. My automation meant that reposting was a 2 minute process, regardless of how many items I wanted to repost. New listings were a few minutes (if the brand/style/color had been listed before) to maybe 30 minutes total if I had to take images. Descriptive text was supplied by my client (I sold on consignment), so that was generally a non-issue.
Manually doing these things via SYI, on those occassions when I wanted to see 'what the other side' was doing, took significantly longer, with less satisfactory results.
True Story: I got VeRO'd for my use of "Velcro", which is a trademarked name. Several listings were pulled and continued incorrect usage would have costed me my account. So I contacted the VeRO member contact person, they explained the issue and how I could resolve it, and I reviewed my source data from my client (who, I then noticed, listed some inventory with Velcro closures, some with hook-n-loop).
Using the features of the automation I was running at the time, I corrected my inventory data (my Item records) and then had the program update all currently running listings for those Items. There were several hundred to be corrected. I started the process and then had supper with my family. After supper, I went back to the computer and everything was as it should have been.
My time spent, overall, was maybe an hour. Not including the time to update the listings because "I" didn't update them - my computer did. THAT's the power of automation - getting things done while spending time elsewhere.
Check out SixBit - use the link above and you can see the different versions available. There are other options in eBay's list of "verified" applications -- perhaps one of those would be a decent fit.
Think about today. Plan for tomorrow. Act accordingly.
-Bob.

V.46 Trading Assistant/Consignment sales, since 1997!
See my About Me page for more details on the best tools for desktop automation for eBay!