Cheap alternatives to avoid tire punctures If you head to Walmart and see the slime bike liners for in the tire to stop goatheads and small nailes from actually running the tire.
Is there anything around the house or shed that can be used also?
Also the slime ones only seem to not cover the side of the tire wall. I do rock and outdoor bike riding and once hit a soft dirt patch that sunk my tire and a small nail got in from the side. 

Any suggestions?
Puncture resistant tires and liners are hard to DIY since they are made from kevlar and other specialty materials which are not easy to come by on the consumer market.

Flat protection opions:
Puncture resistant tires $35 to $80 a tire - most expensive, best protection, only good for the life of the tire. My favorite lightweight ones are panaracer t-serve, most protection panaracer ribmo.
Tire Liners - $15-$25 a set- cheaper, reusable when you get new tires, adds a bit to rotating weight.  Mr Tuffy and Slime brands are available. I haven't used these personally.
Tubes with sealant - $10-$15 per tire - will seal small punctures with a liquid sealant. This is pretty much the same liquid in tubeless tire setups. This can have mixed results. Slime can get messy and clog valves. I don't think these are worth it.

Really, none of these will prevent pinch flats either. Your best bet is to use one of the first two options and keep tires inflated to the proper PSI regularly. Always carry a patch kit and tools to fix a flat and a spare tube is nice to have as well, it pays to be prepared.