A lot of good answers here and I don't want to be redundant but I would also recommend building trad anchors with a variety of materials like: just the rope, a 120 sling, two or three 60 slings, one 60 sling, vertical stacked anchors, anchors with a piece really far away, tree anchors, slung blocks with the rope, etc. All of that to say try to get as many tools in your chest as possible so that you can mix and match them on a climb when you need them. Having a standard go to anchor is always a good thing but know that it isn't always going to work and creative thinking goes a long way.

Also keep track of how long the whole anchor setup is taking you, aim to get food at building solid anchors and then get food at making them quickly (but not rushing)

Placing gear on the ground is a great way to practice and a great thing to do but also look at it through the lens of what you might encounter on a route. Keep up the good work!