It doesn't matter what product or service you're promoting with solo ads, the process is the same.
You'll send traffic to an optin page, capture an email address, and then follow up with that person until they either buy or unsubscribe.
So, let's walk through doing this for a Clickbank product.
First, you'll want to select a product to promote.
I would choose a mass market product that is already converting well (has a high Gravity score within the Clickbank marketplace) and also has some prewritten email swipes you can use for your autoresponder followup sequence.
Tools you will need...
Once you have your offer you'll create a custom landing page with a drag-and-drop software like ClickFunnels.
Plug in your followup sequence emails into your autoresponder.
Mask your landing page URL with a click tracking software like ClickMagick (to protect you so you don't get cheated by the solo ad vendor).
And then you'll invest in your solo ad clicks.
After the solo ad has completed you'll measure your results, such as...
Once you have this information you can make the decision to either scale up (if your results were good) or you may need to tweak some things in your funnel to optimize it so you can at least break even.
And then you simply rinse, lather, and repeat this process.
That's all there is to it.
Over time you'll build up a massive list that has the potential to pay you forever with very little maintenance or effort on your part.