I look at the latest valid signal that matches my trading plan (usually this has occurred within the last couple of 5-min price bars) and see if there's an opportunity to get in on it. If there is, I look at five or six other charts (1-min, 15-min, 30-min, 60-min, daily, weekly) and tally up all the reasons the trade I'm contemplating will fail and all the reasons it will succeed. This usually confuses the heck out of me and wastes valuable time, causing me to miss the proper entry because I didn't place an order as soon as I saw the valid signal. Then as price immediately makes a quick, strong favorable excursion right after moving through where my order would have been filled, I emerge from my analytical reverie, shout "Doh!", and chase price right into where my profit-taking order would have been filled, then watch as price stalls, and then turns the other way right through my stop loss.
This generally wakes me right up and I'm ready to start my trading day.