Learn about them, their backgrounds, their previous activities, their frame of reference, their group affiliations, etc. Identify the power structure, both overt and covert. Some of the realities of the state legislative process This is not a rational process. Disappointment is the first experience. But you must not let this dissuade you.
Most legislators are honest, but come with very little understanding of the needs of the public.
Trust them until you learn they can't be trusted. The role of the State Legislature is strengthening in this country and with the federal-state relations and revenue sharing as well as with Title XX and other federal funds the relationship of the budgeting process from state agencies and governors must be clearly identified every step of the way and worked with. For instance Florida is mandated by the Constitution to have a balanced budget. The staff can be an invaluable source of information. Staff report meetings can be good places to present ideas for legislative changes and new bills.