I know there are plenty of tools to achieve similar things, but I love my bookmarklets.
Issue: If you have two fields by same Localised Label on an entity, you are not sure which one to pick and end up experimenting. In my current assignment, the previous vendor had a custom field by the same name as an OOB field contact.mobilephone, and client wanted to remove this redundancy. Both fields sit next to each other in dropdowns on Advanced find view.
I wrote a bookmarklet to tell them apart.
javascript:$("select option",$("iframe#contentIFrame0").contents()).each(function(k,v){v.text = `${v.text} [${v.value}]`;})
Here is a visual to help.
Feel free to modify and enjoy PowerPlaying!