Let's focuses on the toaster for a bit now. Seeing that the toaster didn't have enough going on to appear like a convincing metal object I used a little trick to add distorted reflections that are characteristic of chrome surfaces.
To make this effect I set my brush to 100% opacity and brushed some soft light and dark gray tones on a layer over the toaster. I then selected the magic wand tool and set it at a tolerance of 2 or 3 and I begin clicking and deleting the parts that the magic wand has selected for me. As you can see the selections wrap around nicely and I am left with an effect that works well.
After finishing with the last step I realized that the side of toaster was still too dark so I worked in a stronger reflection into the toaster. For the hot toaster coils I drew out the shapes using the pen tool, added orange stroke to it and applied an Outer Glow layer effect to it.
In this step I fully flesh out the bread slices. At first I was just going to just cut out the slice of toast from a photo but it didn't look good so I ended up sampling colors from the bread photo using the eyedropper tool instead and coloring the bread that way. I added some steam/smoke coming out of the toaster for some dynamism; any kind of movement is good in a composition like this. I also added some yellow lighting around the toaster because it was starting to look too monochromatic.
I move back to the juicer and add some yellow rim-lighting as I did with the toaster. For the oranges, I sampled colors from a photo reference and lit them to my liking, much like I did with the slices of toast.