Making the most of it!

As a family we hold several membership cards;
1.national trust, costs me £55.50 per year
 2.English heritage, £37.00 per year
3.gym membership 18.00 for me £10.00 for Dylan per month so yearly costs- £336!
4. zoo membership. £23 for me £19.95 per child (although Dylan's dad paid for his) so cost me £31.95 per year.

So for memberships I am spending a whopping £460.45! Put like that it is a massive amount, now these are all due at different times of the year so I am able to spread them out, but still as a yearly cost that is a lot. I need to know I am getting my moneys worth from each of these.
This year I am planning on tracking our use of each of these to make sure that they are worthwhile for our family. I am adding a page on the blog here so that I can track their use, each time we use one of these cards I will track the visit and the cost had we not got our membership. They need to at least balance with the cost of the membership- although preferably I want them to be saving me money.