Hi,
The key point is to provide strong documentation and evidence of your ties to your country of residence.
You can submit:
Your employment letter + your payslips for the last 3-6 months + letter from your employer that you will still have your job when you return
Your personal tax returns for the last 2-3 years
6 months bank statements for bank accounts held solely by you + for joint bank accounts you may hold with your husband.... there should be no large recent deposits.... and if there large deposits are then do add an explanation to prove the money is rightfully earned by you..... and it is not deposited for the visa purpose
Typically you should be able to show about CAD 1000 per week of your visit.... plus cover airfare.... if you cannot show this amount then your husband can give a Letter of Financial Support stating how much funds he will give you/your daughter for your visit + proofs of his personal tax returns/all his bank statements/his business documents to support this letter
You can also give proofs of bank term deposits, financial investments, pension schemes, shares/stocks, property or land ownership, jewelry (if it evaluated), etc.... whatever is applicable in your case.... either owned solely by you or jointly with your husband
For your daughter, you can provide school admission documents, approval from her school to take vacation from XX to XX dates, examination details if she has to give exams after returning, etc
Your sister must also give you the following documents: If she is employed then her employment letter + payslips for last 3 months + her bank statements + NOA + photocopy of her status in Canada
Hope this helps. All the best