If you are limited to the amount you can spend on your budget for your ads you may need to make sure this is not wasted.
You can effectively spend your budget ensuring you don’t miss out on any clicks or spending more than you can afford. This can be done by firstly lowering your bids to reduce the average cost per click.
If you make sure that your campaign is set to “Daily-Standard” then this will spread out your daily budget throughout the day instead of using it as early as possible.
Trying out different looks for your ad could optimise it. For example changing the text in the headline and in the description to see what works best and generates more traffic, then from the results you can decide which ad is the best to appear on the search result pages. Trial and error works well here as you can just keep trying out different ads to see what works best for your campaign and what will generate the most sales for your business.
Just by changing, adding or deleting keywords, match types and bids you are able to lower the costs and improve your results. If you have keywords within your campaign that are working better than the others then you can increase the bids on these keywords that are generating sales and then to save yourself money you can decrease bids for the keywords that are not performing as well.