Watch foreign films and television programs, and listen to music with Spanish, French and German lyrics. This is one of the best ways to familiarize yourself with the sounds of a new language before beginning to study it formally or reproduce it verbally. You can find these media artifacts at libraries and online. You can use subtitles and Internet translations if you like, but the simple act of hearing the languages in context will help to make you more comfortable with them.
Purchase, rent or borrow language learning software to use during individual study time. There are several commercially available options; research the strategies employed by each one before making your decision. Dedicate at least one hour a day to studying the fundamentals of each language. Divide your time equally among the three languages. You will start to make revealing connections, unmasking universal rules of linguistic communication. Your studies in Spanish will help advance your studies in French, and vice versa.
Introduce yourself to native speakers of the languages you are studying. Once you feel confident speaking a few basic phrases in each tongue, you have the necessary building blocks for conversational speaking. Putting your skills into practice almost immediately upon the start of your self-instruction is a particularly effective way of increasing memory recall. Never underestimate the power of speaking aloud well before you have a command of the language. It may help to join local language groups and clubs for support.