>>33303487 (OP)
Go out constantly
Get a hobby that can be done with others, I recommend learning an instrument and joining a band
Stay in shape
How do you feel about your job in the trades? If you don't like it or you're indifferent to it I recommend starting on a degree now. Even if you like your job I would still recommend a degree in case you want to get out of it later.
Find a gf who loves you. If you think things are hard now, things are going to rapidly get worse once you turn 30. The emotional pain of loneliness eventually becomes physical pain.