Here are some general rules for planning your form's user interface:
Keep it simple.
Don't throw every possible control at the problem.
Plan the design before you start.
Use paper or a white-board to draw out what your form will look like.
Group related controls together.
Try to find relationships between controls and put them together.
Use controls for their intended purpose.
Example: Both a label and a text box can display text, but when you want the user to change that text, use a text box.
Anticipate the sequence in which controls will be used.
Put the most-used or first-used controls towards the top and left of the form.
Model forms after real-world instruments only if the result is simple and easy to use.
If the original instrument panel is complex or confusing, you have the power to improve it when you design your forms.
Keep your forms neat by arranging controls.
ATEasy has a toolbar devoted to organizing and arranging controls. You can use it to improve the arrangement and symmetry of controls you have positioned by hand.