Make sure that you future husband have enough finances to support you here without course to public funds.

That's what ECO will be after. I remember a friend of mine whose wife is English but claiming benefits here in UK (not working) so when he applied for Spouse Settlement Visa.. obviously it got turned down. It is your future husband's financial/employment status with enough disposable income, relationship with him and place for you to stay here in UK that will help convince the ECO to grant you a visa.