I've found that if I have many distractions or if I find myself struggling to require "100% focus", I just stop scalping all together. Scalping to me means trading off the 1 min charts. I'll choose a higher TF chart. Watching every minute bar complete for anything more than about 45 mins to me is just too much. Thats why if I scalp, its only the opening 30-45 mins usually. As I get older, sometimes its only a few times a week depending on where we open relative to previous session high, low, close, open.
In the emini's, the 5 min chart is just about perfect for trying to catch a good move without requiring that 100% focus. I'll drop down to the 3 min for volume clues early in the session. Sometimes the chart looks cleaner on the 15, so I'll even go up to that.
Trading shouldn't be static. You shouldn't be trading purely off 1 time frame. Honestly, I dont think many professional traders stick to 1 TF but I only know of a few. There's just too many sessions where 1 TF is just cluttered and not flowing right and hard to read. I will just jump up to the TF that is cleanest and trade it accordingly.
Hopefully this helps.