Julian's answer regarding remembering the names of the modes is very helpful. I would add that remembering how to perform them or utilize them in a composition just comes down to repetitive practice. Practicing the modes on your main instrument, just like you would practicing any other scales, will get them in your fingers for performance. Learning the structure and characteristics of each mode through study will get them in your brain and ears for writing purposes. It's a bit like learning the multiplication tables.
For study purposes it helps to remember that some of the modes are "major like" and some are "minor like", but they are off of the major or minor by a flat or sharp.
"Major Like" modes -
Lydian - Major scale with a sharp 4th scale degree
Mixolydian - Major scale with flat 7th scale degree
"Minor Like" modes -
Dorian - Minor scale with sharp 6th scale degree
Phrygian - Minor scale with flat 2nd scale degree
Locrian - Minor scale with flat 2nd and flat 4th
Ionian is a Major scale
Aeolean is the Natural Minor scale