MMS,
Ask your self what your method is and then create a checklist (if you can). Then no matter what number of charts you are looking at you'll have a criteria. This way if you move from Corn to Silver all you have to do is go through the checklist and see if the criteria to enter is there, if yes then enter, if no then skip and move on.
If you have a different method for different products (grains, fx, metals, etal) create a checklist for each one. When you're looking at Corn use the Grains Checklist, when you're looking at Silver use the Metals Checklist etc.
Also if I might add, if a trade is going against you it is OK to exit only if it is in your method to do so.
Make sure you know what market conditions your method works in. If it only works in one market condition then only trade when that condition is present (no need to dump the whole method). For example, my method doesn't work in all market conditions, so I stay out until the market condition that is optimal for me is present.
I hope this helps you. I wish you all the best of luck. Also, don't just consider day trading you can use 4hr or Daily charts. Remember that is where the trends are strongest.
V.