The Campaign for Independent Britain (CIB), a cross-party campaign with an uncompromising withdrawalist position vis-a-vis the European Union (and its predecessors) has a useful website, which I can recommend people who are interested in some aspects of the problem. Information ought to be our strength and any website that spreads it needs to be supported and read widely.
I do note, in parenthesis, that all the campaign's officers are now male. Some developments have passed them by but one can't expect everything. (Once upon a time I was their Press Officer, as so often, the token female.)