A common motto is semper prorsum, "always forward." You can find examples of this all over Google, and is used as a way of expressing the necessity of marching forward. "Always forward, never backward" is what the link is saying in Latin—double down and don't retreat. Semper prorsus is a less common but still valid alternative.
If it's not too cheesy, I'd also suggest just a simple Excelsior!. This has now entered the common parlance as a way of saying "Onward & Upward," which I think gets to the heart of what you're intending to convey.
"Duc in altum !" coming from the Holy Scriptures (Luke, 5,4): dixit (Jesus) ad Simonem duc in altum et laxate retia vestra in capturam : Launch out into the deep, and let down your nets for a draught.*
Here is a list of Latin phrases, including 20 or so beginning with semper. The translation they give is semper anticus, which is the motto of the U.S. 45th Infantry Division (now combat brigade).
Other expressions with "semper" (always) include semper fidelis (always faithful), semper fortis (always brave), motto of the U.S. Navy, and semper liber (always free), which may have inspired an Italian song of a similar name from La Traviata.