Write as much as you can.

I believe great writers are made, not born, so even if you’re not a natural at writing, you can get better. You can be good. The trick is to do as much writing as you possibly can. Take on writing projects. Ask for writing projects. If you dread or fear writing, the advice I am giving you can be hard to take, but the only way to get better at writing is to do lots of it.

Source: How to write great emails in the age of social service | Relate by Zendesk

Need an idea? “Solve your own problems.”

My ad­vice to those of you who are still look­ing for an idea is to solve a prob­lem that you your­self have. Then you’ll know it’s some­thing at least one per­son re­ally wants. And when you’re part of the tar­get mar­ket, you’ll have in­sights about it that you wouldn’t oth­er­wise.

Source: Jessica Livingston’s Pretty Complete List on How Not to Fail · The Macro

Not to mention that you’ll be far more motivated to make it work. 🙂