The music notes that fall on spaces in the bass clef are A-C-E-G.  “All Cars Eat Gas” is the saying to remember the bass clef spaces.  (If you like cows better than cars, use “All Cows Eat Grass”)

The music notes on the bass clef lines are G-B-D-F-A.  The sentence we use to remember the lines is, “Good Boys Do Fine Always”. 

If you can think of your own sentences to help you remember the note names, go ahead and use them.  The most important thing is that as you get more comfortable reading the notes you learn to read music instinctively and naturally. It takes a bit of time to get comfortable bit in time your subconcious recognizes and picks up the information fairly quickly (especially if you’re using a good music reading program)