How do I conjugate to the "simple future" tense in Spanish?

To form the simple future tense in Spanish, you have to take the infinitive of the verb you want to conjugate (for example 'escribir' or 'viajar' and then add on the appropriate ending. These are the endings in the simple future tense:
I = é / you = ás / he = á / we = emos / you (plural) = éis / they = án
For example, if you wanted to say "we will travel" in spanish, you would take the infinitive of the verb "travel" which is "viajar" then you would add on the simple future ending in the "we" form which is "emos". This will give you "viajaremos" which is the correct translation of we will travel in spanish.