In one sentence, describe what the following article is about:

With weight loss or weight gain, it's helpful to set reasonable and realistic goals.  With weight gain, you'll want to aim for a gain of about a half to one pound each week.  That means in a two month time span you could gain anywhere from 5-10 pounds. You may also want to set smaller, more frequent goals along the way to let you know how well you're progress is going.  For example if you want to gain 1 pound per week, but you're only gaining a 1/2 pound per week, you can readjust your meal plan and calorie goal to help you increase your weight gain. If you need to gain more weight than that you'll most likely need to readjust your goal timeline to allow for further weight gain. Food journals will be very helpful when you're trying to gain weight.  They will serve as a guide when planning your goals and if you need to make any changes.  Track all the foods you eat each day.  Include all meals, snacks and beverages in one day. Try to be as accurate as you can.  You may need to use a food scale or measuring cups to help keep you on track. Also keep track of your total caloric intake each day.  This will help you if you need to make changes to your calorie level. Keeping track of how much weight you've gained will be incredibly important.  If you don't keep track it'll be difficult to tell how much you've gained and if you've met your goal.  Get on the scale about 1-2 times per week.  Weight gain happens more slowly than weight loss, so more frequent weighing will not be useful. For the most accurate weight, try to get on the scale the same day of the week and at the same time. Keep track of your weight and progress in your food journal.

Summary:
Set reasonable goals. Start a food journal. Track your weight.