I find this modification very useful for getting Adhesive Bandages to stick to fingers, especially fingertips.
Yes they make special ones, but standard shape/size ones are more common, and these work great!
This idea may be from a Japanese show called "Urawaza", lifehacker and gizmodo had a youtube link but its gone!.
Step 1: There Is Really Only 2 Steps for This Mod, Cut It, and Put It On.
Take some sharp scissors, and a Band-Aid
You can cut the band-aid in the wrapper or out of it. probably cleaner/safer to do it in the wrapper.
Cut to the pad on both wings of the band aid, like the first photo(im flexing it to show the cuts)