You can apply for scholarships at any point in your academic career as long as you meet the requirements.
Always check with your colleges of choice, trade schools, and school guidance office for future scholarship offerings.
Here are some great sites to start your funding research. Create an account on the sites of your choice, and use your "Funding Opportunity Log Booklet" to keep track of your applications, accompanying paperwork, and deadlines.
United Negro College Fund Homepage
RaiseMe
Gates Millenium Scholars
FastWeb
BigFuture
Scholarship Finder | Career One Stop
Scholly
NC Department of Military & Veterans Affairs
Unigo
Scholarships.com
National Naval Officer's Association
American Welding Society Scholarships
American Welding Society Grants
Avoid Financial Aid Scams!
Here are some books that can help you with the scholarship application process and find even more educational funding opportunities.
Educational Funding Resources