To this last one I'd add: assuming that you're never 100% certain you can avoid war, carefully plot out an 'East first' strategy, whereby Germane fights a deensive war in the West and never violates Belgian neutrality.
I tend to agree, but it's not 100% risk free, there is still that chance Britain will join in France backstabbing you and even bribe the Belgians, maybe even Dutch, into letting them all pass through.
In addition/alteration to the given points, I'd suggest:
-- Focus on strenthening the army at the expense of OTL's naval expansion
A necessity
-- Rather than just discreet colonial swaps, offer to sell any existing German colonies to Britain for a reasonably low price
Germany can work sales to its possible benefit. The best terms, just in case Britain cheats, would be to get immediate payment in durable goods, especially any stuff that might be blockaded, gold, or marks.
Also, without ruining the sale price negotiations, it's good if the legislatures and media of the Dominions - South Africa, Australia, know that Namibia and New Guinea are on offer for sale, even if those Dominions can't unilaterally make a purchase decision without London. Because it's good to influence public opinion not just in Britain but also those Dominions that Germany is not a threat and also a country you can do business with.
Also, you're not limited to selling colonies to Britain either. You can see if the US is interested in Micronesia, in order to link the Philippines, Guam, and Hawaii, and so much the better if you get on their good side.
I'm not sure the value of selling Togo and Kamerun. France got most of them in OTL, Who do you sell to here? A neutral country like the Dutch who you can still trade with if blockaded?
A benefit to keeping Togo and Kamerun is that any troops the French use to overrun them, even just African troops, are troops that are not available for use in crucial battles in Europe, at least until later.
In fact that's the value of the option of swaps instead of sell-outs in general. If Germany could trade in, pre-WWI, most of its existing colonial empire to Britain, in return for some of the British outpost colonies in West Africa like Gold Coast, Sierra Leone, and Gambia (a boy can dream and say Nigeria, but I won't), it can tie down alot of French African and Algerian troops for a long time, especially if there's any German commanders on par with Lettow-Vorbeck.
-- Avoid interfering in Morocco, since it's not going to do you any good
More is probably gained than lost by this.
-- Do everything to dissuade Wilhelm II from any misguided 'public relations' efforts, e.g. no giving interviews to the foreign press
--Yes, it's not helpful, even if I don't think its as decisive as you do
-- Don't suddenly decide to extend the Berlin-Baghdad railway beyond Baghdad and right towards those British-owned oilfields
sure