A list of helpful hints while working across the whole system:
Product image optimisation for faster uploads
It helps greatly to make sure that images been uploaded are not greater than 2500 pixels in any one side. The images displayed in the virtual shelf are naturally limited by the screen resolution. As such, having an image larger than this brings little benefit.
Product image preparation and automatic cropping
Sometimes when handling many product images, we need to make sure to crop the images correctly to remove the white space around the product. This is simply done by using XnConvert. This is a free program that can really help you in batch editing and automatic cropping of images.
Simply add the images and make sure you setup the correct steps in XnConvert.
Batch Rename product files easily
Product images received from the client can be quite disorganised and as such, we need to a tool to rename the 100s or so of files we get, for this we can use 2 programmes, both of which are windows based.
Windows PowerToys
Booth tools will do the job, in terms of how to use these, I will leave you to explore it as it is easy to learn 