@Aceeee82 There are build mode items that can create a focused environment all the time using Enable Emotional Aura. I tend to build a house before I add Sims so that I can add items like that as some have to be unlocked via a career, in particular the Tech Guru career
So in build mode you can add the Revanne poster or the plasmatron TV, I think the stack of CDs and computer hard drive do it too. Some items that used to do it, like the modern wall clock don't do it now for some reason but I'm sure the ones I've mentioned do. If you're not sure, take a look at any locked items in build mode linked to the Tech Guru career. When collecting or making prints, the astronomy/space/microscope prints found while observing the sky, etc or using the big microscope give off focused moodlets with emotional auras enabled. Also elements you've got from sending away crystals/metals or extracting elements yourself do the same if you display them on desks or shelves for example. I'm not in my game right now but they are the ones I can think of.
You can get them to drink pitch black tea as well and listen to New Age music. I can't remember if Focus music does it too. A citrus bath soak does it as well as yoga. With Get Together you can add it to a club like a chess club and set the Focused mood with club rewards.
There's also the reward potions too and I think maybe the celebuserum with Get Famous do it. Probably some science lab serums too but I can't think which ones at the moment.
But to keep a focused mood all the time I use the build mode items.