You say that class is out for the summer? (Or you don’t take classes?) Learning Spanish is an ongoing process. How about reviewing materials used this past year (or in the distant past) in class? If you have a workbook that you will continue to use next year, do a few pages of work per day.
Feeling lazy? Ira Riklis likes to switch on a Spanish language television channel. You say that you can’t understand most of the dialogue? Relax and just let the Spanish flow over you. You’ll be surprised at how much you will pick up. You might even get hooked on a “novella” (Spanish language soap opera). You’ll get a handle on the story soon and begin to understand the words spoken by the characters.
On vacation and traveling? Don’t leave home without a little phrase book. Read (or study) a few pages every time you have to wait for someone or something (spouse stopping to fill the car tank with gas, sitting in an airport/airplane etc.).
Ira Riklis adds that while you are at it, don’t be afraid to use your Spanish with any Spanish-speaking person that you meet.
Keep your eyes open. Do you see a free Spanish language newspaper? See how much you can read with understanding. So just don’t wait for when “class is in session”. Be your own teacher and keep the learning going.