Make a tentative list of a few artists you absolutely won't want to miss and memorize or write down their set times and stage location, instead of making a structured schedule for your day. Then, pack the printed daily lineup in your bag (if you've printed it beforehand, as Electric Forest does not provide this) or screenshot the schedule on your phone for easy access. With all the art, installations, events, and activities going on in the venue, it can be easy to miss a few of the artists that you'd planned on seeing.
A good rule of thumb is: Will I kick myself afterward for not going to their set? If the answer is yes, choose that artist as one of your few daily must-sees. If the answer is no (but you still might be bummed), take note of when their set is and where it is going to be. If you find yourself having unexpected fun or making new friends in the venue during that time, don't drop everything to go see that set. If you're close by and feeling a bit idle, then go check it out! Be sure to take screenshots of the lineup before entering the festival grounds and place your cell on airplane mode. Cell service can be hard to come by while inside the venue and the whole idea of Forest is to find a deeper connection than any cell phone can provide.